If You Give A Man A Horsecock

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Johan's girlfriend is a wee bit obsessed with equine endowments, and convinces him to volunteer to be enhanced with them... but is that the only trait he wants to share with them? Would a horse phallus even function if it wasn't attached to a horse?


(M TF Horse)

Johan had known about Francesca's love of horses from the start. Yea, all little girls like ponies and princess and stuff, right? Well, when they started to date he started to wonder just how much she liked horses, and found out it was more than the average woman. Well, she inherited her uncle's ranch one day and moved there so she didn't have to pay rent- it was close enough to the edge of the city bustle that she could just take a bus to work. However long before she got her hands on it- the ranch has been devoid of animals, so her dream of having a bunch of strong horses on hand from when she was little remains just that- a dream.

Fran dropped a magic tome on the table but it was so heavy it billowed out the table cloth and caused the legs of the table to flex from the impact. "I figured out which runes do what, so we can control it!"

"You aren't a professional magi! Also, I don't want to be an animal!"

Francesca got her hands on a tome of transformation and immediately looked up a horse transformation spell! Johan was immediately leery knowing she has only taken a single class on magic in highschool, that didn't teach anything more complicated than temporarily summoning simple household tools, like a stool or a fork. A horse is a little more complex than a fork, and he didn't want to think of what would become of him if she forked it up.

She spun the giant book on the table and pointed to the note page she slipped between the pages of all the different rune variations. "I taught myself. Going to an official school to study it doesn't change the nature of the spell, if you learn the runes than you know the spell regardless of any certifications. You always wanted a bigger dong, right? Well guess what this spell can give you."

Johan sighed. He probably should have not let that one slip. Drunk one night talking about random nonsense he let it slip that he actually wished on a shooting star twice back when he was in his teens... and on both occasions wished his dick was bigger. His isn't small it just... also isn't big. His girlfriends never complained about it- he just wanted it to be bigger for himself. More dick, more pleasure, right? Well, being hung like a horse certainly did mean he would be a LOT bigger. It... also meant he would be part animal. For himself? Sure, he would love it- but he did not love the idea of Fran being the one in charge of giving it to him. Also, what if they break up at some point in the future? How does he get another girlfriend if he has an animal dong?

Johan sat down and let her ramble on about the function of all the different runes- he supposed she certainly sounded like she knew what she was doing. Amazing what she can accomplish when she knows there is a horse dick involved.

"So... you are sure this rune is just for the penis, right? I get a horse dick and that is it?"

"Yup- I am absolutely positive."

Johan let out a long groan. "Fine! Let's do it. Nothing ventured... right?"

Fran even scrounged some mana crystals for the spell in case they needed it- but they shouldn't anyway- the ambient mana is enough for a full horse transformation and she is literally only changing one single body part, which only needs a fraction as much mana. That is just how prepared she is though- she is taking zero risks. Johan sat on the couch in the living room opening his fly and using his balls to hold his underpants down, and Fran cast the spell crouched at the table- removing all the runes that are not for the penis. Spells are not sentient obviously, so the transformation magic doesn't know what a horse is- you have to define a horse for it to turn you into one; so if the dick is the only thing you describe in your runic array- that is all that is going to change.

"See? I know what I am doing. I would not take ANY risks when it comes to a permanent change like this."

"Wait WHAT?!"

"Oh... did I not tell you that part? I thought I told you. Wasn't that the first thing I said? Well... yea, this isn't a polymorph you can dispel- this spell is permanent. Which is why I made damn sure I got it right."

Johan shivered and smiled a bit nervously as he felt the magic in him. It seemed to erupt from deep inside of himself and travel out under his anus and up through his taint and then into his penis. Hmm, that is right... technically the taint is part of the penis as well. He started to get an erection faster than he ever had before, or at least it felt like he was. His taint swelled and stiffened but his penis seemed to bloat in girth more than length at first! It started to stretch longer and longer, the feeling of getting an erection just kept happening as blood rushed into the shaft! It did not seem to harden past a half-chub, because the flesh started to loosen again as it grew, relieving tension even as his blood continued to feed more into it! Never mind the feeling of having a giant penis- he wished he could keep the feeling of it growing! The warm tingle was now more of a faint electric pleasure that seemed to undulate through his entire shaft! The glans were not growing equally with the shaft though, and he felt an internal pressure there, which triggered all the dense pleasure nerves in the corona, making him squirm in spite of forcing himself to not touch it with his hands. The veins grew very fat around the base and his glans stretched horizontally, pulling tight and losing their shape. The area around his urethra impacted, causing the urethra itself to project out like a little pipe. The glans still grew with the cock- just not in the same proportions, causing the cleft head to be very wide. The ultra-small bumps around the corona swelled in size, creating a bumpy rim. Once his dick was nearly three times its former size, the weight was bowing it forward quite a bit and then it suddenly inverted in the middle! The skin folded on itself, then bulged and popped straight again- now with a plump medial ring in the middle of the shaft, where it would fold in on itself when flaccid! A horse's penis is so large it is telescopic. He groaned and humped his hips, loving the feeling of the tremendous weight of the shaft bobbing lazily between his legs as it continued to grow! He went from 5.5 inches long to 11 before the medial ring even formed. Now he could SEE his heart beat in the throbbing of the shaft as it stretched in pulses, doubling in size again to 22 inches and still going!

"Uh...Fr.. Fran... how big.... is...?" He was starting to feel quite woozy, and a little bit cold, like the cock was draining his energy to feed itself.

"Hm? Oh, how big is a horse penis? In a large workhorse- since we wanted size- 3.5ft. Which is... 42 inches."

Holy Gods, 42 fucking inches of dick meat?! That is EIGHT times the size of his old penis!! That is even substantially larger than a baseball bat! His body felt weak and cold but his cock was SO hot, and felt so extremely good. It was almost an itchy, electrical pulse of pleasure with each throb of growth because expanding the entire penis triggers all of the nerves in it at once! The cock started to bob this way and that with the throbs without him moving his hips at all. It stretched longer and further from his actual body, which caused any movements to be exaggerated. The last tenth of the immense cock stretched fatter in the shape of an inverted cone, yanking the sensitive nerves of the corona further out as it flared gigantically! The flared horse glans are bigger around than his entire face! The tight urethra oozed a steady stream of pre, and burbled up a glob with every pulse. Johan could not think straight, only moan as he leaned his head back and felt the weight increasing, more and more. 30 inches, 35... if he was standing right now, his cock would be the same length as his legs. 40 inches... finally it slowed to a stop at 42... but Johan immediately passed out as soon as the intense sensations started to fade.

Johan woke up about a half hour later and Fran immediately sat up when she seen he woke up again. His penis is flaccid again from sleeping, but remains nearly three times as long as his former size, even when completely soft. His balls look comically tiny, almost completely hidden under the fat cock on top of them.


If you give a man a horsecock... he will ask for a horse heart.

"S-so, the spell worked wonders- your dick is fucking PERFECT."

He looked at it and had to agree it did look impressive, and knowing it was his gave him a new level of appreciation for the shape. The weight was massive but it felt sooo good, like, the weight itself felt reassuring tugging on his groin. The sleeping cock started to very slowly shift.

Fran started to look nervous. "POOP!"

"...what?"

"Urine! Uh... your grandmother!"

"What the hell are you saying?"

"Try not to get erect!"

"...why?"

"Well, there is a slight problem with the transformation. You see, you only got the phallus of a horse, right?" He nodded. "Well... you uh... sort of don't have enough blood in your body to sustain a penis that large in the first place. You have a horse dick, but a human heart. You passed out from blood loss- in order for you to be erect your body no longer has enough blood to stay conscious."

He smacked his forehead. "So you gave me a penis that could potentially kill me. Okay, for now jus- aaaah shit. Just remembered it's permanent."

"Okay, it's okay! I have all the runes, remember? I can just cast the transformation spell again, and this time only use the trait rune for a horse heart!"

"Well... okay, I guess. It isn't like people can see my heart, right? No one will know."

"Right! Uhm... you may want me to make another little adjustment..."

"Which is?"

She grabbed some of the soft flesh between her thumb and index and bounced the dick up and down. "How do you feel about being circumcised? Because the horse equivalent of that is you don't have a sheath."

"Oh? Ooooh, I get it. My dick has nowhere to go. And it's supposed to be in a sheath so it is too sensitive to let flop around in the open all the time, but I don't have one. Can you even do that? That isn't horse transformation that is a body modification. Or regeneration, technically."

"Yea, I know, I looked it up while you were passed out. So. Horse sheath and heart?"

He shrugged. "I literally cannot function without them, so yea."

This time the change made itself known as his heart seemed to skip a beat, and then returned with a powerful thud. He felt a warmth spread through his body and an odd pressure as his veins were forced to swell fatter and hold more. His heart beat became almost deafeningly loud in his own ears- though Fran could not hear a thing, so she was a bit nervous from not being able to tell if anything was even happening. The formation of a sheath felt even more bizarre, though it also forced him to try and think of gross things to prevent it from erecting at the feeling. The skin at the base swelled up and then rolled over forward. It formed into plump rolls that swallowed more and more of the base as it grew. A sheath is also essentially phallic flesh, just an inversion point like the medial ring is. The flesh ballooned outward forming fat folds and wrinkles as it bunched up. Suddenly his shaft seemed to pop and sink inward! If you've ever intentionally or accidentally popped your nuts back into your torso- it felt sort of like that, except the object inverting is a lot bigger. As part of the sheath- he now has a bit of reserved storage space in his hips to pack the behemoth away in. This caused the sheath to become more narrow and normal looking- it was becoming almost spherical with plush skin folds because of a lack of room. It took a minute for his heart beat to settle down and stop ringing in his ears, but everything did eventually balance out.

Fran clapped and squealed giddily at her handiwork. "We did it! You are hung like a horse, and it all works as intended now. Now~ how about we try you out~"

Johan chuckled and dropped his pants entirely, but remained in his spot on the couch while she shoved the table back and got back onto her knees between his legs. From all the movement and feelings of change, his dick was once again mostly out of the sheath already, but drooped off the edge of the couch since it was still mostly asleep. Fran noted it looked a bit odd- just because few horse are so pale as to have a fully neon pink phallus- but Johan isn't transformed enough for the skin to change color. She grabbed the sheath and squished the soft skin, causing more shaft to spill out. The head already rest on her cleavage and only now started to fill that she wiggled her chest back and forth, bouncing the head from one tit to the other. She placed one hand on the end, one at the opening of the sheath, and rest the medial ring in her cleavage so she could bounce the whole shaft off her boobs. Fran pushed forward with her breasts and pulled back with her hands, holding the cock to her, so she could feel his heart beat through it against her own. The shaft became red hot as it stretched, the fat loose rolls of skin pulling straight and smooth, the plump veins bloating up on its surface and beating with greater strength. She cupped her hand around the corona and squeezed it when she bent her fingers, causing it to burble up more precum. Because he was not penetrating her, it took a bit to work him up- which was fine by both of them; they can savor the moment. The behemoth started to really buck as his balls lifted and the head flared enormously! Fran changed position so she could cup both hands just behind the flare and tug up on the underside of the corona! Johan came powerfully, but after a few throbs he also felt an ache in his nuts and further back too! Each throb was echoed by an ache. Fran on the other end of the phallus raised a brow waiting for the blast of spunk... he throbbed at least nine times in orgasm before she even seen the cum, and it was a slow, gentle trickle.


If you give a man a horse heart... he will ask for a horse prostate.

He groaned, not sure how to feel about what just happened. The buildup was amazing, and the release was both good and bad at the same time. Why did it HURT? The actual release of cum was also extremely unimpressive.

He gently held his tiny balls. "That... sort of hurt. Are you sure you didn't goof something up?"

Fran sighed. "It probably hurt because of this." She held up her hand revealing a few drops of cum- basically his entire load. "Your penis is strong enough to try and draw out a bigger load than you are capable of making in the first place. It took forever to exit your shaft because there is so little of it compared to the size of your dick. You have a horse cock; but you have a human balls, human prostate and human seminal vesicles."

Johan groaned, knowing where this was going. He looked at his little nuts- almost entirely eclipsed by the girth of his shaft. They did look ridiculously tiny in comparison now. He did not want to be more of an animal but his nuts could seriously do with an upgrade. At least a horse prostate and that won't even be visible outwardly- like his heart; he doesn't have to worry about anyone else seeing it and thinking he is a freak, because it isn't visible outwardly. They aren't going to know without shoving a hand up his ass, and it's pretty safe to assume that probably isn't going to happen.

Francesca once again prepared a transformation spell, this time putting in the runes for several parts that they needed. Johan felt a subtle tingle in the very base of his dick for a moment that spread out in either direction, but then almost jumped off the couch when he was hit with a sudden powerful pleasure! His softening dick immediately paused and started to wobble back out! His balls clenched and swelled up, increasing weight and stretching his scrotum! His prostate transforming on the other hand sent powerful throbs of pleasure through him, like incredibly short orgasms! Johan could not help but squirm in his seat from the pulses- too deep inside of himself to help or hinder. His dick started to flop from side to side with his squirming, slowly returning to erect. His scrotum started to darken as the wrinkles in its surface started to flatten out. His balls were clenched up against his pelvis, which would normally create slack in his scrotum, but his balls are getting too big to hold them, flattening the creases out regardless! He actually heard a few quiet, muffled gurgles as his balls enlarged! He started to pant and moan as he suddenly felt pent up; as if it had been forever since the last time he came... even though it was a couple of minutes ago. His dick started to drool pre again steadily, and Fran immediately returned to her knees in front of the behemoth to comfort the giant. She gently held its head in her hands and repeatedly licked the pre off before it could fall from the head, and gently sucked on the projected urethra when waiting for a new dollop of salty goo. His balls started to look bruised now and the skin pulled so taught that it became shiny! The scrotum stretched so far that the roots of the sparse hairs across it were forced out and they fell out along with the rest of his pubes- replaced by an almost non-existent peach fuzz. Only now did his scrotum start to expand to keep up with the orbs within. From bruised looking to a dark bruise, then to a shade of brown that is almost black in comparison to most other colors before stopping. His balls released, but took only a second to bounce back up, then down, then back up. Each testicle was the size of an ostrich egg- as big around as his entire face. His prostate would not stop sending pulses of pleasure, and he was leaking pre now like a broken faucet. It almost seemed like he was already having an orgasm just from how much pre he was ejaculating! Finally his balls gave one last mighty throb and held up high as Johan experienced a horse's orgasm! The wide urethra let the cum fly like a garden hose! He completely filled Fran's mouth with the first jet alone, soaked her with the next two, soaked the table and the floor with the next three before finishing!

Johan went to get something to drink as soon as he recovered from his hormonal haze, then they both had a shower to clean up. Then he had more to drink. He had a serious case of cotton mouth. He was also a bit groggy and his head ached a bit, like he was dehydrated somehow. Fran just bit her lip and told him to drink more and he will probably feel fine. She actually has a pretty good idea what is wrong- but avoids bringing it up at risk of him getting upset.


If you give a man a horse prostate... he will ask for a horse's ass.

Johan drank what seemed like a crazy amount of liquid, yet did not have to pee much. Also as soon as his dehydration symptoms went away, he found himself unusually horny and sensitive, and his lazy dick started to flop out and drool for almost no reason at all. His prostate also sent subtle pulses of pleasure into him every so often, which was a good feeling but also that can't be normal. He wandered around the ranch trying to find Fran again but she vanished for a bit. When Johan found her again, she had a mare in reins and was leading her to the barn!

"What? Where did you get a horse?! I got a horse dick, why would you go to town and buy one?!"

"I didn't. I used the whole transformation spell on one of our hens, hehe. This horse was a chicken a bit ago."

"...why."

"Because you are still getting adjusted to your new body, and I don't have a driver's license to use your truck. So I figured I would turn a chicken into a horse that I could ride into town when I need."

He sighed. "Or your just looking for excuses to make an army of sexy equine. In any case- my prostate is sending pleasure jolts for no reason. It feels good and all, but it feels good for no reason, and I can't stop it."

"Hrrnnn... I was hoping this wouldn't be an issue."

"What? What did you do?"

Fran put her hands on her hips. "Nothing! It is what you told me NOT to do is the problem. You have a horse prostate but your hips and butt are human! It is sending pleasure jolts because it is being gently crushed at all times- there isn't any room for it to fully engorge, which is also causing you to leak constantly. And the reason you became so crucially dehydrated before-"

"Let me guess, missing another horse part?"

"To make that much fluid your body needs something to make it out of first. Your bladder and stomach don't have the capacity to filter that much material in such a short time."

Oookay. Well stomach and bladder he isn't too worried about because again; fully internal, no one will know. Just turn all his organs to horse ones, fine. But how do you make room for a prostate? A horse's ass. That will VERY much be noticeable. Even if they can't tell it is a horse butt- it will be huge!

Fran put her hands on her hips. "Well, you don't have to, but you'll always be leaky and have a trigger happy dong, even if it's still in its refractory period and you can't actually milk the serpent. I like horse butt, so you know where my opinion falls."

Johan groaned, shuffling his legs from the sensation deep in his hips, and feeling the front of his pants become wet- the precum starting to saturate straight through his underpants. "B-but I will look like a freak?"

Fran pat the mare. "You don't have to go anywhere- I can go to town for us and then no one will see you in the first place. Besides, you think no men out there have big butts? Pffft."

"Rrrr- fine!"

Fran let the mare into her new stall in the barn and then hustled back into the house where Johan was already waiting. His fly was undone again so his dick could drool onto the low living room table instead of on the carpet or saturating his pants even worse.

Francesca once again placed several trait runes into a transformation spell and cast it on him. Johan immediately groaned and huffed several times- his stomach felt tight and made several loud churning sounds as it expanded. His torso is still regular human sized though- so his gut started to push out to make room for the expanding organs! His gut swelled out, making him at first look like he had a pot belly, but then actually swelled big enough to make him almost look pregnant. Well... that is unfortunate, since it isn't fat so he cannot flatten it with exercise, and the transformations are permanent so magic can't reverse it either. He arched his back steeply at a prickly feeling and felt the muscles in his lower back start to squirm. OH NO! He assumed that would be another trait- but apparently you cannot have a horse's butt without also having its TAIL! Hairs just like on his head started to sprout and grow long rapidly as his tail bone pushed out into an actual tiny tail. Most of a horse tail is just hair, so the actual flesh and blood portion is actually pretty damn small.

He almost coordinated his thoughts long enough to complain but then was washed over by a different pleasure. Pressure started to come off his prostate and his pelvis gave off several hollow sounding pops as it jittered in the sudden movement of expansion. However, giving him a new pleasure; warmth and tightness inhabited his thighs as the muscle inside started to flex and swell! His thighs were growing quickly, which also had the effect of ballooning up his glutes- his ass cheeks expand tremendously! He grabbed the sides of his pants as if he could force his body to fit them, but his ass yanked his pants almost painfully tight before fighting off the grip of his hands, and yanked the pants out of his grip! More and more ass cheek billowed out behind him over his pants, forcing them down further and further, and then his thighs themselves became so big that they too pushing his pants lower and lower- no longer fitting in them at all! His pants were shoved to his knees and then just fell off and pooled at his feet entirely! His ass is so huge he would need pants meant for someone five times his weight class. His tail started to swish as it filled out, against his will. His thighs were absolutely bulbous with swollen muscle- the cleft between muscle groups is so deep it looks like something you're meant to swipe a credit card through. His pelvis popped and expanded even more! It wasn't just giving him horse shaped hips for his human body... it was becoming an ass fit for a full sized, large work horse. His ass became twice as wide as his torso, then three times as wide! Each ass check was big enough to squish a human under, never mind both together. He could feel his bowels expand as well, causing his guts to gurgle again and suddenly he felt a sort of emptiness back there... almost like it was hungry. His anus started to expand, but the muscle rings also grew, causing it to puff up and squeeze tight in spite of the increased width, forming an extremely dark brown ring- the same very dark brown his balls took and trailed onto his sheath. His prostate started to take the coloration as well, connecting the two areas. His prostate also got a LOT longer. Because of how broad horse hips are- the male genitals and anus are actually surprisingly far apart, giving them a very large and long taint.

"Hoooo~ h-h-h-aaah... ooh... my God. It is fuh-f-fucking huge!!"

Fran blushed and walked up beside him, patting the curve of his gigantic butt cheek. It was solid with muscle, so you'd need to smack it REAL hard to set it into motion. "Buuuut- more importantly; does everything fit properly?"

She caught him completely off-guard, placing a hand against his huge doughnut-shaped anus and then plunging in! His ass is so gigantic, she can easily shove her entire arm into him with very little resistance at all! Johan squirmed and moaned helplessly and Fran quickly found the bulge of his engorged prostate and grabbed it lightly through the side of his colon while elbow-deep in his butt! He held his tail up on reflex alone, allowing her full access. As soon as she squeezed the prostate, he immediately fired a stream of precum, then his balls lifted, then another stream of precum that turned white halfway through! Johan hit orgasm so quickly he did not have time to think about where his giant cock was aiming and launched ropes of cum across the living room at the television, with enough force that they actually made audible thudding sounds on hitting the TV screen! His glans were flared so huge the end of his penis looked like a trumpet. Fran giggled and pulled her arm out of his butt again, giving his giant ass cheeks another slap and letting him catch his breath.

Johan was clearly distressed afterward- not expecting to get a tail at all, and his ass is twice as big as he thought it would get and he already thought it would be far too big! It was like he had a small bed permanently strapped to his rump! He had to grab onto something to heave himself onto his feet because of how heavy his ass is! When he sits on the couch he takes up the entire couch! A cock longer than his legs are, balls as big as his face, and an ass as big as the entire rest of his body. Not like he can do anything about it now- the magic is permanent. He could tuck his tail into pants- once he orders pants so ridiculously enormous that they actually fit him. People will just think he is the most absurdly pear-shaped man that ever lived. His gut is a big dome now so people will probably just assume his body has insane weight distribution.

He can consciously control his tail- but Johan found that even if he doesn't, it still moves on its own. Whenever he feels anything brush up again him or feels an itch- the tail immediately moves toward it. When he feels really good it starts switching side to side more energetically; almost like a dog, but too much hair and not enough tail to really wag.

He found himself getting horny every two or so hours- a LOT more frequently than normal. Though, thanks to the transforming and the feelings it keeps giving him, he kept getting off several times in a small window of time. Like any muscle- the more you use it, the better it gets at being used. If he has that much sexual activity in such a brief window of time, his body is going to try to adjust to it. It is because of this that by that evening he found out he cannot fit in Fran fully... which honestly shouldn't have been much of a surprise. He can sink into her past his medial ring but definitely not the entire thing- her torso isn't even long enough for that to be possible even if she somehow lost all her organs. She also loves to use her mouth on it though- she just has to be really careful if he cums inside of her, because his flare is so enormous that it locks itself in place, preventing her from removing the dick till it is done- so she better be able to breathe. And Francesca LOVES playing with his balls. Gently patting them, bouncing them on her palms, petting the smooth scrotal flesh, and rolling the soft folds of the sheath between her fingers. Even when he is not aroused and she doesn't intend to have sex- if his balls are within reach, she will have at least one hand on them. As time goes by and they become musky, she rolls her face between them and licks and kisses the scrotum.


If you give a man a horse butt... he will ask for horse legs.

It is a bit awkward trying to get comfortable in bed that night- because his ass is so gigantic he overlaps her side of the bed. The next day Johan attempts to make his rounds to the chickens and now their new mare, but his feet start killing him. His hips are so huge and so heavy that his legs wear out incredibly fast. Johan knows what Fran would say, but he tells himself it is good exercise. He will build strong leg muscles to counter this, and balance his lower legs with the upper, eventually. But will that be enough? Before it was even lunch time he was starting to hobble and needing to balance against something else. Not just his legs but his feet are strained, even if he endures this long enough to build up leg muscles... they will be human leg muscles on the lower legs, and still horse on the upper. He will still be off-balance, so his feet will still hurt.

He had also been trying to contain his hormones all morning, and embarrassingly found himself failing once he got to the new mare. He wasn't... attracted to the horse. I mean- it's a horse, he is a man. But she was waving that rump of hers in his face, clearly enjoying her new transformed body like he unintentionally enjoyed his. He kept thinking about how he had a horse member while looking at her, and how horny he is and how her holes are just out in the open- horse don't wear clothes, generally. He wasn't... attracted to her, he was just so horny already and that happened to be where he needed to take care of it. The mare gave him flirty glances trying to coax him over to her stall but he remained over on a hay bale trying to take care of his own pillar of meat- its head far above his when it stands. He wished he had something to penetrate, but even Fran cannot take the entire phallus- though not from a lack of trying. His balls start doing jumping jacks in his scrotum and he finally erupts cum hard enough to tag the rafters in the barn before splashing back down to get absorbed by the stray hay on the floor. The mare huffed- disappointed the load wasn't for her.

He finished the random chores around the ranch but it took him till noon, which is at least two hours longer than usual. Having to stop and get off his behemoth member and having sore legs did not hurry things along. He was wobbling from side to side needing to get off his poor tortured legs and flopped into a kitchen chair as soon as he got in so heavily he almost broke its legs with his weight- not to mention the seat was so narrow compared to his butt that it almost went into his ass instead of under it!

Francesca paused doing the dishes to look over at him as he sighed. "Trouble?"

Johan groaned and put his face in his hands a moment. "I need more horse."

"Really? I thought we balanced everything out already? Or do you just want more for the sake of-"

"My legs are killing me! My feet and lower legs can't take the weight. I can't walk around for more than twenty minutes before I need to sit again!"

Fran hummed in thought, drying her hands to go get the spell tome again. "Yea, muscle is heavier than fat- that rump can't be light. Actually now that I think of it- the bones in your legs are probably creaking too; if we don't change them the cartilage buffer between bones might wear through and cause the bones to directly grind into one another which is... bad."

"I keep getting... unusually horny too. Is that just a temporary side effect?"

"Yea, well we had a lot of fun yesterday, and you have extremely impressive new equipment so of course you'd... be... hmm."

"What?"

"Actually... it might be your balls."

"Huh? They are already horse."

"Well I know that! Haha. But the rest of you isn't, so the amount of hormones your testicles are producing are enough to drown the rest of your biology."

He groaned again, even longer than before. "How the hell do we fix THAT?!"

Francesca had to think about it for a moment. "We make you as big as a horse. I give you the size of a work horse, so the dose of hormones matches your size and becomes diffused."

Fran already had the spell set up by the time Johan shuffled his way to the living room. When she activated the transformation spell, he quickly removed his socks, but it didn't occur to him that he would also need to remove his shift. The muscle mass from his upper legs swelled and then spiraled further down, distributing the size to the lower legs. The middle toe on either of his feet started to grow tremendously as the others shrank. It became so long and so large that it dragged the entire foot longer, and drew the other toes inward, threatening to devour them entirely! The nail became a solid charcoal grey block and then started to expand further to consume the end of the digit entirely. The rest of the bones in his foot fused together as it expanded and was stretched longer- becoming a cannon bone. The rest of the toes were regressed into nothingness as the sole survivor of his toes became giant! The nail now a U shaped hoof of an odd-toe ungulate. The expansion from foot to cannon bone put him higher in the air, and the overall expansion of the bones in his legs raised him even higher! His entire lower half was now monstrously huge compared to his top half! It is SO big in comparison in fact that he may have a lot of trouble getting up from a sitting position- because now his arms are only a fourth the size of his legs, at best.

His muscle and skin started to make a quiet sound like twisting leather, and his bones groaned like old floor boards as his entire body started to grow! Even though this change affected his entire body, it was the most subtle feeling of all the changes yet- because it didn't target any one area. It was just a faint tingling and an outward pressure that existed everywhere in his body all at once! It partially woke up his giant cock again, but it thankfully did not have the energy to erect itself yet, so it just hung out in a lazy arch, flopping loosely. He did not notice yet that the coloration from his sheath now trailed halfway up his cock, before becoming dappled in the middle and then transitioning back to pink. He was too pre-occupied with thinking about the growth and how rapidly his shirt was constricting him that he also failed to notice right away that a brown shadow was passing over his skin! Because his lower half is entirely horse- he is growing a horse's pelt! The fur grows in shaggy at the fetlocks, but everywhere else it is extremely fine, and does nothing to hide the contours of his muscles- if anything it accentuates it with the shimmer of the fur. His skin under the fur turns a dark brown; nearly black, but the fur itself is a base brown, and several snow white spots appear on his giant ass cheek almost like mega-sized freckles. His shirt started to rip in several places and Johan looked nervously at the approaching roof, wondering if he was going to outgrow the house itself! A large work horse is taller than a human when standing on all fours... so how big is it when it actually stands on two legs? His shirt shredded, forming several holes that expanded into one another till the body of it ruptured entirely in half. The shoulder seams cut into him a bit longer before they tore as well, and his shirt fell off looking like no more than a rag. At the very least this started to balance his monstrously giant ass and cock out a bit better with the rest of him- they were already at the size of a horse so obviously they aren't going to get any bigger.

By the time Johan stopped growing his hair brushed the rafters above him. Francesca is only as tall as his groin. Before he could say anything though, his upper thighs let out a loud pop and pulled wider horizontally, shifting how they socket! Johan fell onto all fours immediately, yanked down by his own biology.

"W-what?"

Fran gasped. "Uh oh....." She looked very nervous.

"What happened?" He forced himself back up but it was very hard. In order to stand he needed to bend his back a bit. It was difficult to keep his legs at a proper upright angle. Not impossible- but difficult.

"Fully horse legs and hips... it changed how your legs socket to your pelvis... you have the legs of a quadraped."

"...I... can't walk?!"

She pointed at him. "I mean you are standing right now. It is just... awkward. And probably not easy to keep up for a long time."

He groaned so loud it was almost a roar. "That is what we changed my legs to FIX! So what... I have to..." He looked at his now giant hands.

"Maybe. Up to you. You can still walk on two legs, sort of. Horses rear up on their hind legs- so their legs can bend at that angle, they just aren't meant to hold it. You are still relatively human shaped, so you definitely can walk upright, just not great."

Johan had a slight forward bow, unless he bends his back. So if he doesn't care how awkward he looks leaned forward all the time, he can still walk. His hands are so big compared to her that he could wrap a hand around her entire head! Even his hooves are as big as her head, and make very heavy clopping sounds against the floor. Johan was just relieved the growth stopped, while Fran was clearly aroused watching it go down. She grabbed his soft cock with one hand and kissed his balls, interrupting his examination of himself- and discovering his lower half is now furred. He groaned, wanting to at least wait longer before they romp again since he just got off a bit ago. He wanted time to think about how this shape affects him now. She was easily working his giant member back up though, so he gave in and got down onto his knees. He might as well work off this latest boner- it is too big to leave flopping around in the open for no reason. At his current size his dick would end up knocking over endtables and flipping chairs as he walks around. Johan has to be careful handling Fran now- she is like a doll compared to his size and he could hurt her entirely on accident. She had no worry at all, and quickly bent over to present her own rump to him. His dick is the same size, so he is able to fit about half into her before she bottoms out. He still wished he could fully penetrate. That bottom half of his cock needs love too. The two of them fucked on the living room floor to the sound of all the dishes and knickknacks in the house rattling together as the force of them humping shook the house.


If you give a man horse legs... he will want to look the part.

Johan managed to keep his mind off sex for the rest of the day- at least till evening. Fran did not make that an easy task. Her flirty looks did not end, and she smacked his ass every time he was close enough for her to reach. If he stood still long enough she would start to play with his balls or stick her fingers into the soft, plush flesh of his sheath and see if she can't tease anything out. He almost thought about going to the barn to pretend like he is doing chores just to avoid her flirtations for a little bit, but then remember how unintentionally aroused he was when near the mare the last time and decided against it. By the evening enough time had passed that he just stopped fighting it and let her have her way. Fran's level of affection for his new mega cock was not attraction, love, or even lust- it was an obsession. She wanted him to rub it against her, ram it in her- she wanted to inhale its scent, stain the inside of her mouth with its taste, chug his cum till her breath smells like the inside of his balls! Her fantasies were always repressed- even if she were in the presence of a horse, the fact it is a feral animal would have held her back. But her boyfriend turned horse? No reservations there. It is her biggest fantasy made real.

Johan tried to get into bed that night with Fran shadowing him, but the moment he sat down on the bed the entire bed flipped on its side from his weight, then the legs snapped off and it flopped back down flat. Well... guess their boxspring is fucked. It can't hold his weight, putting the bed immediately against the floor, exploding the wooden frame out. He is so gigantic he covers the entire bed, but Fran doesn't care in the slightest, because HE is her bed. Francesca climbs up onto him and sits on his round belly, presenting her honey pot to him as she spreads her legs, while putting her face at the opening of his giant sheath and licking the soft, dark, musky flesh, and cradling the sides of his balls with either hand, rolling them gently. His fingers alone are the size of his former penis size, so he fingers her pussy on his lower chest, and she works out the monumental cock into the open.

"It is a shame you don't have the cute horse ears too."

"Hmm?" Johan obviously was distracted with what she was doing to his engorging cock.

"And a mane! You would look SO handsome with a mane."

"Oh... you'd like... wait, no, more... horse?"

"I mean yea, but just aesthetic changes really. You have to admit you look a little lopsided at the moment. You are hot as fuuuuck, but you can sort of tell it was an accident. If you had a mane and ears it would look a bit more balanced out, y'know?"

"Uh... I..." It was so hard to concentrate with his cock starting to wag up and down in erect throbs as she massages his heavy balls. "I don't know, it's more horse..."

"But you think it would look hot, right?" She clenched her pussy, squeezing a drip of lube out onto his chest. "You like to drive me wild."

"Uhm...y-yess..."

"Really? So you'll do it?"

"Mmm..."

"Okay!" That technically wasn't an answer, but good enough for her apparently.

Fran reached over and activated the spell on the nightstand. The need to get off was already clouding Johan's head so it did not occur to him that it is a little weird she would already have the spell pre-prepared and sitting on the night stand, before this conversation even happened. Though it is no secret she fully enjoys every one of his changes, and would not hesitate to add more. Once he is fully erect she full-body hugs it to her, cradling the glans just over her tits and sucks onto the head like a leech. Her bare feet rest on his nuts and shove them around in the scrotum playfully. Johan's ears start to flick as they grow out, the muscles forming in the narrow base allowing them mobility they never had before, and the body turned to a leaf shape, growing a very fine fur on the backs to match his rump. Then his skin tickled a bit as his hairline started to progress in the back, down the middle back of his neck. He moaned and arched his back a bit, smiling at the feeling. Lots of long hair to impress the ladies with. He wants Fran to run her fingers through it. His eyes widen suddenly as his spine lets out a dull pop, and then another, and then another! His head lurches further up, forcing him to bend his neck as it reaches the headboard and keeps getting longer! Wait, he didn't know this would happen!! She said mane- and he assumed it would just be hair, but the mane is too long to fit on a human neck; in order to get a horse's mane he also needs a horses neck- she is changing his neck too! He wouldn't have agreed to anything if he knew what would happen! Though rather than frustration or panic, mostly what he felt was just a sinking feeling, and the pleasure Fran was still inflicting on his enormous genitals. The magic isn't reversible, so worrying about it is rather pointless. Complaining is a fruitless effort- once it is inflicted, he has to live with it. The veins in his neck bulged massively and it became much thicker and much, much longer. It felt so weird, looking down at his body now from further away. Fran was doing her best to drown his concerns in pleasure. She wanted her beautiful, handsome horsie to be happy and content. Francesca holds his dick to her body, grinding her pussy against the lower part while sucking the end. She can feel his heart beat through the cock against her chest, against her own heart. Feel the tension in the shaft rising, rising, building, peaking- exploding. The sound of the dull thuds of his cum slamming against the wall above the bed. Johan unintentionally whinnies loudly as he orgasms- oh no, changing his neck also messed with his vocal chords! Exhausted from another powerful orgasm, he falls asleep. Francesca remains awake for a while, licking him clean, but then goes to sleep on top of him.


If you make a man look like a horse... he will need to walk like one.

The next day Johan has a hard time getting up. The bed is sort of demolished, and his legs are so much longer than his arms it is hard to get his upper body into a position where he can heave himself up. Even when he is up, his mistake from last night catches up with him quickly. His hair is now twice as long as before, and his hairline doesn't end till it is between his shoulder blades! His neck is so huge that it causes him to lean even further forward, which strains his back when he walks even more. His legs already didn't quite orient themselves right which gave him a slight lean on their own. The house trembles with every one of his steps- not meant to hold a creature of his size. He needs to duck to get through doorways, and because of his forward lean that nearly makes him fall over every time.

He let out a long sigh at the breakfast table. "I am a freak." His voice is deep and a bit gravelly now.

"Mm!" Fran furrowed her brows and quickly swallowed the food in her mouth. "Handsome! You are so fucking hot- who cares what anyone else thinks."

"I can't show myself like this!"

"You don't need to! I will go to town for supplies and bring them back to you. You just stay here, relax and stay sexy big guy." She leaned toward him with a dreamy look in her eye, telling him she definitely isn't bluffing when she says he is hot.

"Well, I can't even fully fit inside you anymore."

"I love it! Shove that cock so far into me you smear your cum on my SOUL... oh, you mean you want to bury the whole bone? I mean; we have a horse now."

"W-WHAT?!"

"The chicken I turned into a mare, remember? You can fuck her. She is an actual horse, so she could take the whole thing easily. Just don't tire yourself out completely, cuz I still wanna piece ~"

"I am NOT fucking a horse."

"Why?"

"What do you mean why? I am a human!"

Fran looked him up and down with ha smirk. "Mmmmmmm, debatable."

He sighed, bowing his head. Johan unintentionally looked at his distended gut. He can't undo his horse parts, but he can maybe make himself look as presentable as possible.

"This gut, can you get rid of it?"

"Get rid of your GUTS?! Uhm, no."

"I mean how it sticks out. Horses don't have pot bellies like this. I mean... their midriff doesn't sink in, but they don't look like they swallowed a pumpkin whole, either."

"Oh, yea, that is easy enough to get rid of, hold on." Fran left for only a minute before returning with the tome in hand.

Johan pushed his chair away from the table to face her standing in the doorway- though regretted it. His weight in the chair is so immense that sliding the chair like that grinds against the floor- leaving four long scrapes where the legs dug trenches. Johan shivered when she cast the spell, the tingling emanating from his belly outward. He never figured out WHY his gut stuck out like that, in spite of having grown to the size of a horse already. The tingling re-converged at his spine, which then started to let out pops at increasing speed, like a bag of popcorn heating up! His eyes went wide as it finally occurred to him what was wrong in the first place. A horse torso is longer than a humans- it wasn't the size of his body that was forcing his gut out, it was the length. He had to hold onto the table as his torso got longer, putting strain on his back, causing him to lean forward. The table started to wobble as he put too much weight on it! He tried to stand up, but as soon as he did he bobbed forward from his new leg shape, then wobbled forward heavily from the strain of his back being far too long, and then the weight of his huge neck caused him to slowly sink onto his hands. Oh shiiiiiiiit. Gods damnit! He can't stand at all now! He should have thought that out better- especially knowing there is no undo button! Yea, his stomach is nice and flat again, just like his hands against the ground because he cannot stand up anymore!

He sat there breathing heavily, feeling a little woozy.

Fran nodded. "Don't worry, I thought ahead this time- already got you covered."

"Whuh? What do...?"

He inhaled sharply without meaning to- like suddenly getting hit with a yawn, but then he inhaled again right after, and again- without exhaling!

"You are woozy, yea? From your body increasing in size and then getting longer now- your body is likely struggling to deliver enough oxygen to your muscles. Not because of a lack of blood but rather because your lungs aren't big enough."

He kept inhaling over and over, blowing his lungs up larger like balloons! His face scrunched up as he felt a tightness in his chest- his lungs inflating so large that they were starting to push up against his ribs to find space.

"And, your human shaped chest can't hold all those equine organs, so..."

He grunt as the first rib cracked, but then the rest started to follow rapidly! His chest remained just as wide as it already was, but now became much, much deeper- expanding forward! It had the side effect of making his arms feel shorter, because now his chest pushed out past his elbows and filled in the space between him and the floor more. Now his grunts and groans were unintentionally louder- his larger lungs gave him a bigger voice.

"Uuugh... I didn't think..."

"Hm?"

"Ne-neihihiheh-ver mind." He paused for a moment, feeling his wrists starting to hurt from holding himself up like this. Johan looked quite saddened by his current state. "I... need more horse."

"O-oh... okay? What?"

"My hands."

"Right. R-right." She started to flip the pages. "Uh..."

"What?"

"Are... you sure? If I give you horse forearms, you lose your hands. Horse do not have fingers. Well- I guess technically they have one finger, but. You won't be able to hold things, or draw, or write... well you didn't draw or write in the first place- but you know what I mean! You can't hold anything. I mean, I will gladly do your chores for you but..."

"Wrists... ache. I can't stand up, and I can't walk like this. I can't move at all like this. I have no choice, I can't function without hooves!" Fran went to cast the spell but he spoke up again. "Is there a way you can...hmm. Can you... change my mind about this?"

"About getting hooves?"

"Yea. It is normal for a horse, a horse would not be bothered at all by this, so if you give me a tiny bit of equine mind..."

"Oooh- LITERALLY change your mind. That is tricky, but yea, I can do that."

She can't control what aspects of his mind the spell effects- just a percentage, but she didn't tell him that, because it would have just needlessly stressed him out. His expression seemed to lighten as the spell took effect. The thoughts he was stressing over suddenly blanked and he found himself spacing out. His iris suddenly expanded greatly, nearly hiding the whites of his eyes, and his pupils stretched horizontally slightly. The bones in his hands made rapid-fire crunching sounds before his middle finger started to expand tremendously, stretching his hands and drawing the rest of the bones into it! The bones in his arms grew bigger and stronger. His shoulder blades expanded and then popped as they slid further down, and the sockets shifted to be at the furthest point- this caused his shoulders to rotate down to the sides of his now huge rib cage, which allowed his arms to be much, much further out- but also robbing them of some of their side-to-side mobility. A warmth spread through him slowly and a gentle tickle- unknown to Johan himself, his fur was starting to spread, growing higher up his body, consuming his chest, then shoulders and down his arms as they grew and deformed into the forelegs of a horse! The fur advanced partially up his neck before finally stopping again. He had white spots on his shoulders like he did his huge butt cheeks, but smaller than on his butt. He now only has hooves- though the hoof is as broad as his hand was. Now it feels fine standing on all fours, and his body is balanced properly.


If you let a man walk like a horse... he will want to fuck like one.

Francesca followed Johan around the entire day- not sure she would let him wander around on his own without knowing just how horse-like he was thinking now. His thoughts did not seem to change noticeably, but he was very absentminded, and it took him a while to answer even simple questions. He also wasn't worried about his body though, which is great. When Fran was doing his chores for him, cleaning some of the equipment in the barn, Johan clumsily tried to mount her! She flopped over and laughed at his attempt, telling him she obviously cannot support his weight. She quickly yanked a bale of hay off the pile to lay herself on and pulled down her pants to offer her holes to the stud. He quickly plunged in and started thrusting! With his mind half-horse, he is unable to conceive of a reason to resist when his hormones build up. As soon as he becomes slightly horny- he looks for something to mount, no hesitation. Thanks to his long neck he was able to reach down and suckle on her boob while thrusting into her. His breathing was a bit labored though, and he had to let go of her tit to start breathing from his mouth as he skewered her on his massive pillar.

"Oh... poor thing. Your nostrils aren't big enough to feed your lungs, huh? Let me take care of that for you."

She gently brushed the side of his face, running her fingers through some of his hair as his nostrils flared and started to grow! The bridge of his nose let out a pop and the dip on the bridge flattened- putting it level with his forehead. It became tremendously wide, and then the slope of both his forehead and the bridge of his nose started to tilt, as his jaws started to expand outward! His heavy breathing now let out breathy whickers and deep grunts, his voice devolving further.

"N-neheihihihieed.... mmooore."

"More hah-horse?" Her breasts really started to rock up and down her chest as his thrusts increased in strength.

"No fill..."

"O-oh." She blushed, pointing at the mare. "She is ready and waiting still."

"N-no... horse... mehihihi-ahm h-humun." His face continued to make quiet crunching sounds and pull further and further out.

Francesca put her fingers on his chest and held him still while popping off the end of his shaft. "But horses are so hot. You want it, right? Who cares what species who is. I will help you, big guy!"

Fran got up, causing Johan to be a bit distressed- his balls needed release, and the sudden gap in sexual pleasure caused him to panic a bit. His conscious thoughts were too muted to think about why the pleasure stopped or what is happening really- just frantically looking for a way to restart it. Fran opened the hatch on the stall and the mare walked out, not quite sure why she is being brought out right now at first, but once she seen the familiar looking phallus waving around and dripping pre all over the place she quickly turned and lifted her tail.

Johan furrowed his brow a bit. Don't show him that big... wet... pussy. Those big muscular butt cheeks are hot, Fran is right but... and that is where his train of thought sort of fell off the side of a cliff. His iris expanded even further, hiding the white of his eyes and causing the color to look extremely dark. He did a little hop toward the mare's rump but then stopped short, remembering he was avoiding this. But then he could not remember WHY he was avoiding this. He wanted this, right? This was pleasure, he could bury his entire massive cock in her, she is so sexy... why would he ever not do this? He jumped again and this time hooked his fore hooves around the curvature of her thighs and pulled himself forward up onto her back!

Francesca gave him a firm slap on the ass. "Thataboy! Fuck her senseless! Enjoy those moist walls stretched around your meat." Even Fran encouraged him- he did not have to lose her to have this too.

If you can have both, why would you only want one? He scoot up the mare, holding her around her chest now tightly with his fore hooves and thrust into her with all his strength. His face stretched even further, and the fur started to race up his neck onto it. This felt so good, the growth, the change, the lack of responsibility... the beautiful horse under him, wrapped around his enormous cock. More horse... wanted more horse! His pupils stretched even further into rectangles and Johan forgot what he was even changing FROM. His entire head deformed into that of a horse, losing all human resemblance as his fur finished covering him to the tip of his nose- his muzzle marked with a narrow white diamond.

Fran chuckled, rubbing her tender pussy a bit before just getting her pants back on. She can finish herself off later, when he returns to bed. Johan is horny enough to easily service two mates. Francesca finally has her perfect dream- a monstrously well-endowed stallion boyfriend to cuddle with and fuck her brains out! The gemstone in her amulet necklace flashed brightly a moment, indicating it is completely filled; one entire humanity contained inside. Fran took it off and went to put it into storage in the house- she wouldn't be needing this any time soon. All it does is reverse the spell anyway.

If you give a man a horsecock- then he is a horse, of course.