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Horse Blind Written by Leo_Todrius Commissioned by Rouz

The sound of crickets echoed through the night air and even penetrated the barn, creating quite the peaceful atmosphere for Jason's work. Ancient lanterns cast of dull yellow light, contrasting with the almost blue light pouring out of the laptop screen sitting on the rickety shelf. In the midst of it all was the twenty year old with shaggy dark brown hair and jade green eyes. He had an average build for an undergrad student but had managed to keep his stubble at bay even with an extended research project in the field. While most undergrads were getting a broad spectrum of study going, Jason was already polarizing in his field. The snorts of horses near by were a constant reminder of his work and his goal, to extend the equine life span... but that was made all the more difficult by being part of a blind study. He had no idea if the serums he was working with were useful or placebos.

The clack of keyboards returned as Jason entered his data for the day, though every few moments he would stop. The stool he had found was awkward and clumsy. It wasn't the right height, the rungs were uncomfortable and the seat was huge, so huge in fact that Jason had elected to sit cross legged on the top. It had given him more comfort but had the unfortunate side effect of putting his legs to sleep. Realizing that he couldn't go without circulation forever, Jason finally stood up... and nearly fell down. His legs were filled with the unbearable sensation of stinging needles. His hip rammed the rickety table top and a rack of syringes toppled.

"Shit!" Jason cursed. Despite stumbling and wobbling, Jason quickly reached to steady the rack and managed to keep most of the syringes from falling. One, however, sailed over the edge and sunk into his leg. Gravity caused the plunger to sink in just a bit and the orange liquid seeped into his body. With his legs as numb as they were, Jason hadn't even noticed. He turned and the syringe toppled to the ground, landing in the hay. Jason muttered to himself as he pushed the rack back and tried to prop it up better before he crouched down; trying to find what had fallen. He grabbed the syringe with the orange contents and sighed with relief that he hadn't lost anything.

Still shifting his weight back and forth, Jason cleaned up his work area and finished his logs standing up before he put his computer to sleep, tucked it under his arm and made his way for the door. On the way out he reached into one of the stalls to give a horse a stroke across his long muzzle before he headed into the night. Heaving the door shut behind him, Jason realized just how cold it was getting. He had stayed up later than he thought. Thankfully he had a guest room at the farm to conduct his work from. Jason moved up to the old green house and unlocked the back door, heading right into the room so he didn't wake up his host family.

Jason set the computer down on the counter and stripped his clothes, yawning a bit. He thought about the events to come and how he had been invited to the city. It promised to be an interesting day to say the least, and after working in the middle of nowhere for so long, he was overdue for a break. In the dull moonlight he hadn't noticed the slight change taking place. His fingernails were slowly getting darker, fading from ivory to a deep, dark brown... and they were getting thicker too. Feeling too tired for his usual regimen, Jason slid the covers back and slid into bed. His eyes slipped shut and he passed out, all the while the serum was coursing through his veins, starting to change him... He was now a part of a very different sort of experiment.

*****

The steady hum of the car engine was usually a sound that Jason loved, but like everything else since waking up it just seemed to make him feel sicker. Jason was slumped forward, resting his weight on the steering wheel. His bones were stiff, his muscles ached, and his stomach was in absolute revolt. Every sound and sensation made him uncomfortable... except oatmeal. For some reason that had been the only food to quell his discomfort. Jason had consumed three bowls before grabbing several oat power bars before heading out. It was a brilliant sunny day, a perfect day for America's favorite past time. Jason could already see the stadium up ahead... But as much as he loved baseball, he loved Dean more.

As bad as Jason felt, just thinking abut Dean brought a smile to his face. By chance they had fallen in love and Jason wouldn't miss any opportunity to be with him. Jason pulled into the parking lot and paid, finding a spot near the very back. He stepped out and stretched, though his stomach rumbled in displeasure. Jason unwrapped his last oatmeal bar and began to nibble on it as he approached the stadium. People were filing into the entrance in thick steady lines, but off to one side stood Dean. The others were no doubt inside saving seats.

"Jason, you made it!" Dean grinned, jogging over. He was a bit shorter than Jason, his hair a bit darker. In most lights it looked black, though it was really just incredibly dark brown. His eyes were a rich chocolate color and his skin was well toned. Jason crammed the rest of the bar into his mouth and chewed it quickly as he and Dean reached each other. They shared a loose, tight hug.

"Sorry if I was a touch late, I'm worried I might have a stomach bug. We might want to avoid kissing." Jason said softly.

"Nonsense... When a boyfriend doesn't work its his duty to look after his love and be romantic until he too falls prey to the disease, then they share it together." Dean said, giving Jason a light peck on the lips. Jason had to chuckle.

"Another rule from your book?" Jason asked.

"You know it." Dean said, slinging his arm around Jason's waist. The two filtered into line and passed into the stadium. They could hear the roar of the crowds even underground. It was a fair walk thorough the shell of the building before moving up the many stairs. After some time they spotted Mike and Ryan and the two empty seats. Ryan's shaggy, silky blond hair was trapped down by a red and white baseball cap which seemed rather unique on him while Mike's reddish hair was as short as ever. All four settled down and the game began with the customary organ music and the emergence of the teams.

Jason had always been a more fervent fan of baseball than the others, but over the years he had won them over until they all loved the spectacle and the spirit of the game. Sadly Jason's illness seemed to be taking a turn for the worse. Even the first crack of the bat and the tiny specter of a ball heading to the heavens wasn't enough to distract him from how much his feet were hurting. Jason started wondering if the feelings were related or if he had just ruined his hoes. Spending so much time on the uneven terrain of the farm, it was possible he ruined them. He tried wiggling his toes but they were stiff and held in place by the shoes, it was most uncomfortable.

"Ah, yes, one here! Classic!" Mike called out as the hot dog vendor passed. The hot dog was passed down as money was passed back. Jason shifted to pass the hot dog but nearly wrenched up as his pants dug into his legs. They were so tight they felt like they were cutting into the skin. His underwear was no better, wrenching into him. Jason sat up two inches, his hands trying to adjust his pants before he sat down. The tightness of clothing was almost worse than the stomach discomfort. Soon even Jason's shirt felt wrong, though more in that it had ridden up and part of his stomach was starting to show. Jason gritted his teeth, wondering if his clothes had shrunken in the wash. Nothing was fitting right.

"You alright?" Dean asked, noticing his boyfriend was squirming. Jason blushed before nodding.

"Yeah, I'm fine." He lied. Dean looked back to the game and Jason tried to do the same. If he could get his mind off his troubles maybe he could enjoy the rest of the game and not miss any more. As the minutes streamed by, it really seemed that both teams were on fire. Difficult pitches were hit and batters gave it their all. Just when the streaks seemed too hot, both teams started stumping each other. The power shifted back and forth, the game was neck in neck even into the bottom of the ninth inning... and still Jason was squirming.

His fingers continued to clench, the thick black nails almost making him look like a Goth. The wind blowing through the stands ruffled his hair, making the hair along the middle of his head look a little longer and silkier than the rest. Jason was about to give up all hope when he smelled something delicious... Baked seeds. His mouth drooled a little and he ran his tongue over his teeth, not bothering to consider how flat they seemed to the touch.

"Seeds!" Jason said. Dean was surprised, Jason had never seemed to enjoy them before but he was glad he seemed happy about something. Jason sent a gratuitous tip to the vendor and received his bag of roasted pumpkin and sunflower seeds. He began popping them into his mouth and munching away. Almost at once his stomach pains disappeared and he forgot about the achy joints and tight shoes. The stands erupted into cheers as the local team scored a home run, then another. Before long the game was sealed and they merely played out for formality sake. As the final anthem played and finished, the stands started to empty.

"So we get to check out your work tomorrow, right?" Ryan asked, finishing off his extra long corn dog.

"Yeah, late afternoon. I'll text you the address, there are stables out back. I can't tell you all of the specifics of course, but it's a beautiful farm." Jason smiled.

"Wouldn't want to stand in the way of science." Mike chuckled, "See you tomorrow Jase." He said, patting the man on the shoulder before he and Ryan headed out. Once more Dean slung his arm around Jason, though as his arm felt the muscled curve of ass he realized he had missed his target. Dean was a bit perplexed, he'd never accidentally hit too low, only on purpose. Still, it was easily corrected as he moved his arm up.

"So, I get a sneak preview on the ride home?" Dean asked. Jason nodded.

"Yeah, though my feet are really bothering me. Would it be too much trouble to ask if you'd drive?" Jason asked, blushing. Dean smirked.

"Not at all, like I said. It's my duty to be-"

"Awesome." Jason interrupted Dean. Dean merely smirked as they headed down the stands, making their way out to the very busy parking lot.

***

As romantic as a gesture as driving them home had been, Jason was not talking as much to Dean as he wanted to. His focus was remaining completely on trying not to throw up. His feet hurt like hell, his body was out of whack, he hadn't even found the right position in his seat yet. He kept grazing his head against the low ceiling of the car, something he had always managed to avoid before. Worst of all, Jason had to avoid watching the lines rushing past on the road as it gave him a sense of vertigo coupled with a strange euphoria. Jason's nostrils flared wider as he breathed in and out, letting the air fill his lungs. The thought of sticking his head out of the window bubbled up, imagining filling his lungs with the rushing air itself before he brushed the thought away. Somewhere beneath the illness was an extreme enjoyment of going fast, something Jason craved more of... at least until his stomach wrenched and a strange noise left his lips, almost like a whinny.

"Are you alright? Do you need me to pull over?" Dean asked softly. Jason considered.

"I'll let you know when I need to pull over." Jason replied. Dean nodded gently, returning his focus to driving. Jason clenched and unclenched his fingers, trying to adjust to the tepid sea of sensations. He felt like he was being crushed by his clothing. His collar was cutting into his neck, his arms were squeezed, his pants were cutting him off at the waist and his shoes were the worst of all. It felt like there were vices on every part of his foot but his heels, and they were already numb.

Jason reached down to try and adjust his pants. He managed to pry his pants away from his waist for only a moment but then it was cutting back into his skin... but that momentary gap was all that was needed for a most peculiar smell to escape. The scent reached Jason's nose at once. His nostrils flared again and he took it in. It was the scent of sweat and sex, a potent sort of musk... The smell of masturbating repeatedly. Smelling it caused Jason's eyes to dilate and his muscles to tense. The battle between his illness and euphoria reached new levels.

"Pull over." Jason murmured.

"Oh honey..." Dean whimpered, feeling so sorry for his love. The car slowed and pulled into the gravel on the side of the road. Jason nearly burst out of the passenger side door, his shoes skidding in the gravel. Jason made it as far as the willowy tall grasses at the edge of a field, leaning over at his waist. He could feel the wind playing across his body, carrying the sweet scent of the field grains to his nose. Ever so slowly Jason's nostrils stretched, the base of his nose growing just a bit wider. Even the skin seemed to change, becoming ever so faintly tougher and darker. Jason breathed the smell in and felt better, filling his lungs with it over and over again. A smile started to spread across his lips as his stomach calmed... Jason slowly stood up and turned, stopping as he saw his reflection in the mirror.

What caught his attention first was how his cheeks seemed to be darker. Jason reached up, trailing his finger tips along soft stubble... but that wasn't the only thing that was darker. Even his hair seemed darker, closer to black, particularly along the middle. He ran up and ran his fingers through the longer shag, following it all the way over the curve of his skull, a thick portion even hanging down over his neck... Jason was rather confused, but the hair was almost long enough in the center to pull off a Mohawk.

"You feeling better?" Dean asked from where he stood. Jason slowly grinned more.

"Much better. Let's get home. I've delayed us enough already" He whispered, moving back into the car. He lowered down onto his aching ass, finding the tailbone particular troubling, but the pain was second to the pleasure he felt. Jason turned, watching Dean drive; his eyes surveying his boyfriend. He loved every inch of that man... From his dark hair and dark eyes to the birth mark on his hip... Jason wanted him all the more. As tight as his pants were before, Jason grunted as blood flowed into his manhood, a tent forming in the front. In an effort to hold back, Jason looked away, catching his reflection in the mirror. His green eyes seemed darker than before, more soulful... and as he gazed into his own eyes, he was lost for a minute.

Jason's mind filled with fantasies of chasing Dean down in a field, tackling him, mounting him, filling him until cum ran down their legs... The scent of wheat and oats all around, the ground beneath his feet, his hair blowing in the breeze... it was amazing. Jason let out more animalistic noises, trying to hold back as much as he could... but slowly his hand wandered to his groin, his dark nailed fingers starting to manipulate the cloth over his groin. He isolated his shaft, the length visible in a rather obscene way. Jason started sliding his fingers back and forth along the edges, trying not to draw attention to it... at least until they got back to the farm. Once more his lips spread into a smile as he slowly gazed back to Dean.

****

The door to Jason's guest room slammed open as he and Dean spilled in, arms wrapped around each other. Dean murmured louder and louder into the kiss as their lips wrestled, their tongues dancing more forcefully than ever before. Jason kicked the door shut and pushed Dean until he toppled back onto the bed. Jason gave a shiver of delight before he pounced onto the bed, the old springs squeaking as the boyfriends came together again. Soon Jason was grinding his groin against Dean avidly, hands roaming all over him. He sucked on Dean's bottom lip almost ruthlessly.

"Jason, what's-" he was interrupted by an intense kiss before being allowed to continue, "Gotten into you?!" he asked. Jason moaned, licking and sucking at Dean's neck before answering.

"I don't know, I just feel so much better... especially with you. I want to be your stud, your stallion." Jason said, moving to nibble Dean's ears. Dean chuckled and shivered, moving to kiss Jason's cheek. Just as he had missed with the arm earlier, he hit Jason's neck instead. He corrected, his lips finding stubble instead of smooth skin. Dean was surprised and drew his fingers back and forth through the stubble, finding it surprisingly soft and surprisingly thick for a five o'clock shadow. He could have sworn Jason was clean shaven at the game.

"Dude, did you grow? And are you growing a beard?" Dean asked in confusion, trying to get a good look at his boyfriend. Every time he moved, Jason would move as well in an effort to keep their pleasure going. Jason moved to suck and slurp on Dean's neck, tugging on the flesh with his mouth until the skin reddened into a mark.

"Maybe I am growing, that would explain a lot... A second puberty. Height, weight, strength... Maybe I should grow a beard; it might make me look distinguished." Jason replied, grinning before he nuzzled Dean's neck, his chin grazing the exposed portion of shoulder. "It tickles." Dean murmured, suppressing a giggle, though he wasn't fully sure how he felt about the facial hair in general. Still, Dean reached to tangle his fingers in Jason's hair. As he webbed his hand through the locks, he found far more to grab than ever before, another fact that confused him. He quirked an eyebrow, "Jason, are you-" and with that, Dean's mouth was full of tongue once more. Jason drew his thick black fingernails along Dean's shirt before he all but tore it off of him. Dean grunted in shock, the sound disappearing into the kiss. He squirmed as he felt strange finger tips on his skin, but before he could react, Jason was already moving again. With inhuman strength, Jason flipped Dean over onto his stomach and grabbed at his pants. They slid down the boy's legs and were tossed aside before his underwear was unceremoniously withdrawn as well, tangling up around his shoes and socks.

"Jason!" Dean exclaimed, "You've never been like this!"

"A whole lot of stuff is going to change." Jason said, tearing open his shirt and pants before withdrawing his achingly hard shaft. The long meat was already quite erect, hard and curved slightly under its own weight. The mushroom shaped head was practically radiating heat and a tiny drop of clear pre glistened from his piss slit. Jason gave it a few good strokes before it started oozing more pre out over the head, the perfect lube. Jason brought his member to Dean's ass, sliding the shaft up and down between the cheeks like pieces of bread in a sandwich before he tilted his hips and changed his approach. Before long his shaft found Dean's tight pink pucker, wiggling himself around a bit before he started to push into his boyfriend. Feeling the hot, tight muscled depth wrap around his shaft, Jason felt a growing sense of power inside him. Something wonderful was about to happen. He grinned wide as he pushed in more and more before pulling back.

As wonderful as filling Dean felt, pulling out felt even better... almost as if Jason's shaft was stretching. In a way it was. Every time Jason pulled back, he had more cock to work with. Eight inches, nine, then ten. His cock was growing wider as well, prying Dean's ass wide. Dean let out moan after moan as his boyfriend plowed into him. Jason adjusted his angle, seeking out Dean's prostate before slamming into it. Dean grunted hard and arched his back, rearing against the thrusts. Jason licked his lips, loving how wild Dean was being... it encouraged him to be even wilder.

The bed groaned as the two made love, Jason's shaft pistoning in and out of Dean... but the growing cock wasn't the only change taking place. Tingling and heat spread through the upper classman's body, the sensation growing stronger. His thick, dark fingernails grew wider and slipped over the tips of his fingers to form little hoof like surfaces. The darker hair along the center of his head grew longer, darkening even more into a rich charcoal black. As the crest of hair swept out well past the rest of his hair and down his neck, it seemed more like a Mohawk or mane by the second.

Jason leaned down to lick and slurp at Dean. It had started out as a romantic gesture, but the taste of the salt on his skin was so delicious... Jason never realized how much he liked the taste of salt. He kept licking and slurping, in another world as his tongue stretched to a larger size, the muscles inside becoming even stronger. With the flavor filling his mouth, Jason barely knew that his cock was reaming into his boyfriend's ass... which it was doing exceptionally. As Jason licked away, his ears throbbed as the tips started to stretch up into a point, the pink flesh starting to resemble a tear drop shape. Dean was writhing and panting, unable to hold back. His fingers dug into the mattress as he tried to get a hold of himself.

"It feels so good, I can't... I can't-" Dean was interrupted.

"Give into it." Jason grinned, thrusting even harder... The more time passed, the more that Jason grunted and groaned, but it wasn't all pleasure. While Jason had freed himself from the confines of his shirt and pants, his socks and shoes were still on and still constraining. The shoes had been tight all day, but the pressure was surpassing its limits. The soft sound of seams snapping echoed off the walls as the shoe started to split. The ankle popped apart, then the sole of the shoe began splitting. As the bottom fell off, the flesh beneath was revealed to be writhing and twisting in all manner of unusual ways.

During the time of the ride home, Jason's toes had grown together. The seams between the toes had disappeared and his toenails were black and thick, spreading over his toes like an armored shell. The heel of his feet had diminished, shifting his body weight onto the front... and his feet were still growing. Inch by inch the changing feet pushed out of the bottom of the shoes, but they were far from human any longer... as the nail started slipping over the bottom of the modified limb, it was obvious that Jason's feet had become hooves. The hooves lengthened, his ankle lengthened. He was getting taller. Soon the remnants of the shoes were more like ankle bracelets than shoes, but even they were forced apart by the growing mass of the young man. With his feet so much larger than before, it was becoming apparent that the rest of Jason's body was wanting to catch up. His arms thickened into larger biceps and triceps and his chest was filling out. More and more muscle worked deep into Dean's ass, the human going wild. Jason writhed and shuddered in a mix of bliss and pain as his vertebrae stretched and swelled, his back growing taller. Even his tailbone was growing, pushing out away from his spine. As it moved and writhed, long thin black hairs pushed out of the flesh, obscuring the skin and becoming a long curved tail... though the presence of such an extension forced Jason's cheeks apart, his pucker exposed to the air.

Jason writhed and moaned in delight, the pain registering as pleasure in his changing mind. The soft brown stubble that had emerged from his cheeks pushed out centimeters at a time. His cheeks darkened and a short brown beard hugged his face, blending into his darker hair, giving him a far more rustic appearance. Between the wild hair, beard and muscles he was looking far more like a farmer by the moment, but with the tail swinging behind him and his hooves dangling off the end of the bed, it was apparent he was destined to be much more like an animal on the farm.

"I'm about to cum, Jason!" Dean cried out in bliss. Jason's eyes flashed in desire. He pulled back, his cock sliding out of Dean... but the cock that was emerging was rather alien to Jason compared to the one that had gone in. Inch after inch of thick, veined phallus retracted from the hot depths of the boy's ass. He removed twelve inches and still hadn't got it all until there was a wet pop noise as the flat, flared head slipped free. Milky pre cum oozed from the tip of the equine like member. It was clear that Jason was hung like a horse now. Even as he reached to roll Dean onto his back, his cock continued to drip, sustained by the balls that were swelling in his sack. They already seemed to be well past the size of plums. Dean's eyes were crossed in lust, but even in his hazy state he was able to tell that Jason looked different. His ears, his eyes, his beard. He had to speak up, "Jason, something's wrong... We need to get you help!" Dean murmured. Jason leaned down to wrap his strong hands around Dean's member.

"What's wrong with this, don't you like it?" He whispered, his lips parting. He began to lick and slurp at Dean's hard cock, tasting the salty pre. Jason's salt craving jumped again and his lips wrapped tightly around his boyfriend's member before his head slid down, engulfing the cock in hot saliva and a quivering mouth. Dean's protests were interrupted as he dug into the blankets with his fingers, his head tipping back. Jason's head slid up and down Dean's length, revealing just how blunt his teeth had become. It was as if he had never needed to eat meat in his life. Even as fear and questioning rang out in Dean's mind, he couldn't help but thrust into the avid mouth around his cock. Once more he reached to tangle his fingers in Jason's hair, this time as a way to guide the man's head up and down.

The bed lurched with the shifting weight, struggling to keep up with the thrusting and the changing positions. Dean's hips bounced up and down as he fucked Jason's face and Jason loved every minute of it... but his change had not stopped. If anything, it was being fed by the sex. The soft hairs across his arms and legs had grown thicker and darker, the density increasing until his extremities were covered in soft brown hair, his skin invisible behind it. Another surprising change was coming from Jason's face.

Each time Jason drew his head back, his lips and jaw struggled to stay where they were. Thrust by thrust, he was stretching his face. His lower jaw popped, the gaps between his teeth widened before the teeth hanged to fill them in. His upper lip pushed out as well and his tongue throbbed, struggling not to be left behind. Jason's head bobs slowed, able to fit more and more of the cock into his mouth without moving it. As his face stretched, his nose sank into the extension. Is nostrils spread out and merged into the muzzle as the bridge of his nose diminished. He was swiftly leaving his humanity behind.

Dean had been struggling to hold on before the change in position, but the expert blow job was not giving him any relief. He panted, groaned and his eyes went cross as his balls tugged up tightly to his body. A moment later he grunted and his shaft spasmed before he came. He could feel the semen rush up his member before spilling across the hot tongue at the tip of his cock. All around his length the mouth quivered and came alive, pleasing him like never before. Dean screamed out in ecstasy, unaware that his boyfriend's head was well past the mid point of becoming that of a horse.

Jason continued to suck on Dean's leaking cock like a sort of pacifier, letting his entire mouth engulf it. He was mildly concerned as he lost his hearing and his head started throbbing, but before long he realized his tear drop shaped ears were sliding up his head, coming to rest on either side of the thick black mane hugging his head. As they came to a stop, Jason's hearing returned once more. Jason felt an uncomfortable sensation and tried out his new muscles. His ears flicked about, turning one direction and then the other, chasing the itch away. Jason flicked his tail about as well, settling into the new muscle groups with ease.

While Jason's face had been dominated by a rather masculine beard, the hairs had grown softer than ever before, picking up the sheen and tone of a horse's coat. With that change having rooted so well, the fur began to advance more past his beard line. The hairs emerged on his upper cheeks, slipping around his eyes and across where his nose had been. They grew over his forehead and down his muzzle, running all the way up to his equine nostrils. Jason's lips grew dark and his shorter hair turned into horse fur as well, leaving the black mane in the center. His chin and neck were coated and the hair on his arms and legs began changing to fur as well. While there was a lot of body to cover still, the head was clearly horse.

Having spent all of his load, Dean panted in a desperate attempt to reclaim his breath. He arched his back and writhed, never having been pleasured so long after an orgasm. It had seemed like far too much stimulation at first but he'd worked through it. Dean slowly lifted his head to gaze into the eyes of his lover... but when his head got up high enough, he saw the head of a horse at his groin, sucking away, the thick black lips quivering over his cock. Dean's eyes went as wide as saucer plates and he let out a yell of terror and tried to climb away. His efforts proved impossible as Jason moved with him. Dean was anchored down by his cock. He tried to escape but his penis merely stretched, held in Jason's maw. Dean gave up escape and tried another method.

"Jason, is that you?" Dean whispered. Jason gave the sausage in his mouth a few more sucks before he pulled off, a string of cum connecting the head to his equine lips.

"It's me, and boy are you delicious... When can I have more?" Jason asked, his voice barely changed as it came out of the strange lips. Dean was frozen in place, paralyzed in shock. Slowly his brown eyes moved to pour over Jason. He watched the brown fur connect across his boyfriend's collar bone, creep across his stomach and slip around his ass. The fur covered the round cheeks beneath the tail before meeting up with the hide across his legs. Dean kept studying Jason, looking all the way to the tail behind him and his thick, huge hooves.

"Jason, you're... you're a horse..." Dean whispered. Jason laughed, moving to press his muzzle to Dean's face. Dean was shocked at first, but the strong lips working against his pried them apart and as horse tongue filled his mouth, Dean's eyes slipped shut. They exchanged a kiss for a long moment before Jason pulled back.

"I was blind to it at first, I really should have realized what was going on. I dropped some of my experiment last night, I must have injected myself without realizing it... but I guess I'm not in the control group." Jason grinned.

"How can you joke about this?" Dean asked softly.

"What's done is done... You have a boyfriend that's hung as well as a horse. I'm content to fuck your brains out or even help you become like me if that's what you want, but I don't regret this. I'm taller, I'm stronger, I'm healthier and all I want to do is please you." Jason whispered.

"Jason, I love you too, I just don't want you to be hurt. Are you sure this is stable?" Dean asked. Jason nodded.

"I'm pretty sure, but if it would make you feel better we can get Mike and Ryan over here... And I can put in a call to a classmate of mine I trust. They can look me over and give an objective response." Jason said.

"When should we call them?" Dean asked. Jason grinned.

"How about sometime after you wrap those pretty lips of yours around my cock..." Jason said. Dean looked down, coming face to face with the fourteen inch horse cock for the first time. Dean knew he shouldn't be attracted to something so animal, but... it was his boyfriend, it was the man he loved... and it was big. Dean slowly licked his lips before he leaned in, unable to resist. Jason squirmed in bliss as he felt his boyfriend struggle with his meat. Jason tangled his fingers in Dean's dark hair, getting a good grip. While Dean had been content to lull his head forward and back while he slurped, Jason was anxious. He began pushing Dean's head forward, forcing the soft lips around his thick head.

Dean was both overwhelmed and delighted as his mouth was forced around the huge horse cock. He began to suck and slurp on the flat head, finding it so marvelously different... It was so big and exotic and yet it was still Jason, still the man he loved. He sucked harder and harder, his cheeks caressing the length. Jason let out neighs of delight, his back arching. Ever so softly he started to thrust forward, forcing his length into his boyfriend's mouth. Jason's eyes never left Dean, watching him gulp the log down. It was so hot that Jason couldn't control himself. He bit his lips before letting out a whinny as he came.

It would have been a mistake to say that Dean didn't know that his boyfriend was letting loose a load, but even knowing wasn't enough to prepare him for what was about to come. The hot rush bloated Dean's cheeks, his lips clamping down to try and capture it all, but there was just too much. The sperm rushed down his throat and spilled from his lips. Dean gazed up at his horsey lover with intense love as a great feeling of euphoria and heat began spreading into his body, a tingling spreading out from his body. Dean gulped down more and more sperm as it curved down over his chin and dripped down to the floor below.

Jason grinned, basking in his orgasm... but before the first had even finished, he knew he wanted another. Once more he got a good grip of Dean's head and started forcing it back and forth. Dean found it remarkably easy to relax his throat and soon he tilted his head, letting his throat massage his boyfriend's massive cock like a sex toy. Dean was slid back and forth on it, but he couldn't have been happier. He'd never felt so good in his entire life. Even the aching spreading through his legs and arms didn't distract him... but the sensation was certainly growing, and so was Dean.

With his clothes off, the changes weren't as painful as Jason had experienced. Dean's waist swelled thicker, his spine stretched taller and his legs were growing longer. Bones warped, vertebrae stretched... The change was happening at a pace far faster than what Jason had experienced. All Jason knew was that Dean was feeling better around his cock by the moment. Soft black hairs began pushing out of Dean's chin where the sperm had dripped, forming a thickening goatee. Dean even winced as his ears started to push up into points, the cartilage reshaping in mere moments.

While Dean was too far into the pleasure to notice that he was changing, his own member had started to sense the new power flowing through him. Dean's hard cock was growing harder, the length starting to be so full that it almost seemed darker. Jason carefully adjusted his position to reach down and wrap his fingers around Dean's changing member. His fingers worked and played with the length, pushing the mushroom shaped head until it was flat and flared like a true horse. Dean's entire body shuddered before he resumed his sucking with more gusto. In moments Dean was sucking like a true slut, each slurp more intimate and lewd than anything he had ever done before. His head bobbed fluidly, his tongue danced across the length with precision.

Jason grunted in bliss at that, loving what a good slut his boyfriend, no... his mate was becoming. He kept working his shaft back and forth in Dean's mouth, watching him continue to change. A few strands of hair sloughed off from the sides of Dean's head to reveal shorter hair on the sides as the center of his hair pushed out into a similar Mohawk mane. The hair even spilled out down his neck, the crest dropping down his back. Unlike Jason's brown furred body, it looked as though Dean was destined to be an entirely black horse.

Careful hand movements tugged and pulled Dean's cock, stretching it to eight inches, nine, eleven, thirteen... It swelled thicker as well, almost five inches across. Dean's balls throbbed as they grew from the size of golf balls to the size of small oranges, causing his rutting instincts to grow even stronger... But as much as Dean was changing, as fast as he was changing, something was different. His feet were stuck mid-change, his fur hadn't started to spread. Even his teeth were still sharper than Jason's. Jason grimaced.

"We need to get you the serum..." Jason murmured. Dean whimpered.

"But I want to stay like this, I want to just keep sucking... I love your cum, give me more." Dean begged. Jason shook his head, petting Dean's mane.

"We can be together forever once you finish your change." Jason whispered, moving to climb off the bed. Dean chased after Jason's swinging, heavy cock. He gave it a few more licks before it was out of his reach. Seeing Jason fully upright, Dean was taken aback by just how handsome his boyfriend was. Jason opened the back door and began moving across the field to the stables. Dean followed after, tottering on numb, partially fused toes. Once outside, the scents of the farm proved incredibly comfortable to them both.

As they crossed the field, Jason seemed incredibly confident but Dean was just taking everything in. He heard a strange splatter and looked around before looking down. His large horse cock was drizzling salty, musky pre all over the grass. Dean grinned in pride before he noticed motion. Looking ahead, he saw Jason's horsey tail swishing around. Dean moved forward, nearly stumbling before he gathered up Jason's tail and stuck his face into it, inhaling the scent. Jason merely chuckled.

"You're helpless." He smirked, opening the door to the stable. Snorts came from the prize winning stallion as it saw the two enter, taking a step forward in curiosity when it realized that they were horse kind. Jason gave the horse a loving pet on the muzzle before he made his way to the make shift lab. Dean got distracted rubbing his hands all over his stomach, knowing that he had been filled with horse cum from both ends. It was a marvelous feeling. Jason looked through all of the syringes he had knocked over before he realized the orange one had less liquid than the others... and it had been the one he picked up off the floor. Lifting it up to examine in the light, the needle was ever so blunted in addition.

"Is that it?" Dean asked eagerly. Jason nodded, moving to sterilize the tip.

"Yes it is... All you need to be one with me forever." Jason whispered. Dean dutifully offered his arm but Jason shook his head, "I got it in the leg, based on how long it took... We're going to have to try a different site." Jason said, grinning, "Bend over."

"Gladly, though usually I like you sticking something else into me." Dean said. Joking aside, he was not a fan of injections in general, let alone in the posterior. Still, if it would finish the change... Dean braced his arms on the table and bent over. Jason got to work, injecting a slightly larger dose of the serum before pulling back.

"How was that?" Jason asked.

"Not too bad, I-" Dean paused, a grin crossing his face. As dean watched, thousands of tiny soft black hairs began pushing out of his ass cheeks as they swelled and rounded with muscle, the cheeks pushing apart, his picker turning brown and then black. Dean grunted as his tailbone started to throb and change at an accelerated rate. The tube of flesh pushed out, bone by bone and muscle by muscle. Thick black hairs began emerging, pressing out, growing longer until the flesh disappeared. The fur swept around Dean's hips and met up with his bush, the hair on his leg growing thicker and darker at the same time.

Jason moved forward, reaching his horse hands out to rub all over Dean's furry hips. He loved how his boyfriend had the ass and cock of a horse, but he knew it would only get better. The fur kept spreading, Dean's legs growing stronger and darker. As the fur reached his foot, the stunted change in his toes started to move again. Dean had to lean onto the front of his feet as the bone that made of his heel melted away. His toes grew together fully, the flesh evened out and then the black toenails spread outwards. It covered the skin and sunk into it, changing every bit as the feet warped into hooves.

Dean grinned wide as he looked down at his groin, watching extra skin push up around his length, forming a soft and incredibly warm sheath to protect himself. He lifted one hand up to reach down and play with the rubbery flesh. It was exquisite. While he did that, Jason reached around his lover to pinch and tug on his nipples. As Jason played, Dean's pectorals swelled larger and his stomach inflated with abdominal muscles. The fur that covered his lower half advanced upwards, first as a treasure trail and then in general. The fur crept up his back and stomach, moving ever upwards as his arms thickened with black fur and his nails darkened.

Unwilling to resist, Jason once more grabbed Dean and flipped him around, moving until he pinned his boyfriend's back to the wall. Jason's muzzled lips came to Dean's and the two were embroiled in a kiss. Dean's fingernails got thicker and slipped around the curve of his fingers to cover the tips, his collar bone disappearing beneath the black fur. Even the improvised goatee Dean had grown was spreading, more hair pushing out across his face. Jason's tongue slurped around Dean's mouth, feeling his teeth grow flat and his tongue grow longer. Jason grinned, breaking the kiss to lick and suck on Dean's mouth.

"Oh god this is hot..." Dean grunted, feeling his neck widen and cover with fur... and then the most profound change started. He felt tiny pops and shifts in his head before his jaw went numb. Even though he couldn't feel most of it, he could feel a greater weight hanging from the joint... at least until new muscles formed and the joint grew stronger. Inch by inch, Dean's face was extending. Jason moved, bringing his muzzle to lick at the lengthening chin as it grew. The front portion narrowed and honed to a point while the cheeks got incredibly fuzzy. Not to be outdone, Dean's upper lip pushed forward as well. His nose stretched and warped.

As Dean's face pushed into the muzzle, his nose melded into the rest. His nostrils spread out, becoming part of the unified whole. The traces of the nose disappeared, leaving only a slight curve from his forehead to where the thick flesh stuck out forward. The fur continued spreading, sweeping across his muzzle and around his eyes, moving across his forehead as the last pale flesh disappeared, replaced with horse fur. Dean's ears shifted upwards, coming to rest on the top of his head, the black furry teardrops getting used to moving. Dean shifted his weight back and forth on his feet to get used to the sensation. His tail flicked and his nostrils snorted... and then suddenly Dean came.

A whinny escaped his lips as his cock pulsed, sending rockets of musky salty cum across the hay, the thick ropes splattering nearly everywhere... including all across Jason. Jason moved forward, tilting his head so their muzzles could interlock and close against each other... and the two shared a long and lingering romantic kiss. After some time both needed air and they pulled back, leaving Dean to pant for several minutes as the flow from his cock ebbed.

"N... Now what?" he asked softly. Jason considered, looking to the orange needle on the table.

"No we call Ryan and Mike..." Jason grinned.