Beach bod modifications

Story by saaru on SoFurry

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Free story request for FA: SilentFan42

This is a story about Frank, a cat guy that loves to mess around with body altering technology. One day, he finds a strange bracelet that can alter one's body, transferring size by either gifting or stealing. He goes at the beach, and all is well until the device malfunctions, triggering a horny rampage where he fucks everyone while stealing their muscle and growing very hyper.

Contains hyper, cumflation, growth, size theft and a very very horny cat.


Frank couldn't contain his excitement. The muscular 6'2" tall brown furred cat was in his workshop with his goggles on, letting out whoops of victory. After months of trying to restore a particular device, he finally did it. The broken bracelet he had stumbled upon one fateful day was finally starting up and its screen lit up. Frank wasn't sure why, but he instantly knew when his eyes fell upon this device that it was a size transfer magitech trinket. Being obsessed with body alteration technology, he decided to pick it up and give it a repair to test it. It was precisely because of this obsession of his that he had accidentally gotten a body he didn't like: he was way too muscular for his tastes. While he looked very good right now, he missed the days when he looked like a sexy femboy cat. He was also more and more self-conscious about what his boyfriend thought of his physique. His plan was simple, use that bracelet to gift the excess muscle his previous experimentation had given him to a few scrawny guys. He settled on going to the beach to find those lucky guys that would gain the muscles he wanted to get rid of. He put on a speedo over his large sheath and quad basketball-sized balls, tossed a towel over his broad shoulders, slipped the bracelet on his beefy wrist and set off.

After a short while of strutting in town and drawing the attention of many on his very fit body, Frank finally reached the entrance to the nude beach. There rested a sign explaining that everyone was welcome, and greatly encouraged to head to the locker rooms to undress and enjoy the view. He headed to the cabin, removed his speedo and tossed it in one of the lockers. His large sheath and two pairs of basketball sized balls were freed, available for everyone to gawk at. The now naked cat locked the locker, put the key necklace over his neck and headed outside.

As Frank stepped outside, he raised one arm to protect his eyes of the light that shone upon the beach. While scanning the place, he spotted quite a few individuals that really caught his eye: a heavily muscular bear playing some beach volley with a couple other bears, a massive shark sitting on a lifeguard chair that was surveying the area, a rather large dragon that was sunbathing on a beach chair and a bodybuilder gator that was heading to the water for a swim. If he didn't already have a sexy stud of a boyfriend, he'd have tried to hit on one of these guys. But that was enough gawking at beefy men, he needed to search for targets. A scrawny husky sitting right next to the sunbathing dragon was looking intently at all of the big guys here while grinning and wagging his tail. There was also a little gray rat that was building a huge sandcastle.

Frank went to the rat guy first. The smaller guy was completely oblivious to the muscular cat approaching him. It wasn't until Frank's shadow covered the sandcastle that the rat looked up. The first thing the little guy saw was the cat's massive quad balls. Frank crouched and patted the rat's shoulder while encouraging him with his castle building. Unbeknownst to the smaller guy, the large cat's size transfer device activated. At first the gray rodent was scared of the large feline guy but after hearing his encouragements, he relaxed. He started explaining his plans for making the castle a several feet high building. He was so absorbed into his explanation that he didn't even realize that his muscles were growing, nor that the cat's were shrinking. Frank feigned listening to the rat's tirade, but the only thing he cared about was to pump his muscles into the smaller guy. He felt his body slowly deflate and lose muscle definition while the rodent was visibly swelling. The rat looked like he was working out daily, and he was still growing bigger with every second. After a good minute of him giving away his size to the rodent, Frank let go of the rat's shoulder. He encouraged the now beefy rodent to keep going with his dream before complimenting him on his good looks. The rat was puzzled, he watched the cat walk away while wondering what Frank meant. He shrugged it off and went back to working on his project. And suddenly it hit him, he squealed from surprise as he looked at his new muscular body.

Frank was no longer looking overly muscular anymore, he was now very fit. It was however not nearly enough for him, he still had a long way to go before getting back to his goal of femboy build. As he looked at his next target, the husky, he realised that the canine guy had witnessed the size transfer; The black and white furred guy was mouth agape, looking at the rat, then Frank, then the rat again and finally Frank. The cat grinned wide and locked his eyes into the husky's while walking into his direction. The polar dog began wagging his tail furiously fast, closed his mouth and lowered his ears. His cock was already half out from watching at the transfer. As soon as the cat was in front of the husky's beach chair, the smaller guy's gaze was going from Frank's eyes to his genitals before going back to his eyes again.

"Would you like some," asked the fit cat, "little guy?"

The husky answered by nodding while blushing heavily. Frank climbed on the chair and stood on all fours over the husky who lied down. The cat began caressing the smaller guy's chest with the hand whose wrist was holding the size transfer bracelet. With every rub, the pectorals of the husky slightly swelled while his shrunk. Next was the dog's belly, from which large abdominals began rising. He then focused his attention on the husky's arms, making them grow in strength. The husky was huffing loudly while he was being caressed, letting a few moans escape his lips. The experience was highly erotic to him, and his cock had grown to full attention, reaching just over his navel. Frank licked his lips as he continued the transfer, maybe this guy was the one he'd try to have some fun with after he'd be done giving away his muscles. He was surprised to see that after a little more transfer of size, growing the husky's back, shoulders and neck, the black and white dog looked taller than before. Worried about losing something in the size department, Frank checked himself. He confirmed that he was as tall as before, thus concluding that the bracelet had a side effect of making the guys on the receiving part of the transfer grow in height. To continue with the muscle giveaway, he climbed down of the beach chair and began rubbing the husky's legs. One by one, he massaged his canine partner's waist, thighs and calves, making them expand under his touch. After he was done with those, he climbed back on the chair and resumed working on the now large husky's upper body. He was surprised to see that the husky's erection was now reaching over his nipples and his balls were much more massive than before. Once again, he checked himself to make sure that he hadn't lost any size himself in regards to genitals. It looked like the bracelet was making people grow in height and in genital size without having anyone shrink. Frank looked at the husky while grinning wide, he had still so much more to give. He resumed rubbing his canine partner's body while looking at the now massive cock he sported. He was mesmerized by its sheer size. And it was growing along with the husky's body and muscles. The polar dog looked like he was in complete bliss, moaning loudly. His cock was spewing large amounts of pre from the pleasure brought by the cat's sensual massage. Frank realised he too had popped a boner, which looked oversized on his new slim frame; it reached between his nipples. Having almost reached his target muscle definition, Frank let go of the husky and began scanning the beach in search for one last lucky guy who he'd grow. As he got up and began walking away, Frank heard a loud whine coming from behind him. He looked back at the husky, who had taken an enticing pose for the slim cat. He was flexing his large muscles while holding his enormous cock against his massive chest and rubbing it. Frank grinned wide and approached the canine stud.

"Not now, big boy," began the cat, "but maybe..." he said, putting one hand against his waist and the other over his throbbing cock, "you can have that cat all you want, later, in the lockers..."

Frank winked at the husky. A couple sparks flew from the size transfer bracelet, startling the two of them who looked at the device. It started spewing smoke as more sparks flew off of it. Frank immediately put his hand away from himself in fear of seeing it explode. After a few seconds, it completely stopped emitting any nasty stuff. Frank looked at the bracelet. It looked mostly fine except for the mini screen, which was showing a big "ERROR: OVERHEAT". He tried tapping at the display, but as soon as his claw touched the device, a shock was send through him. It now showed some weird symbols which he didn't understand. Before he had the time to try doing anything, he felt a surge of heat invade his wrist, then spread in his arm and finally his whole body. He quickly excused himself and ran toward the showers, leaving the very worried husky alone.

The slim cat reached the showers that were in front of the locker rooms. He realised that he had already grown in muscle again. The current parameters for the bracelet were completely fucked up and no matter how much he fiddled with the buttons or the screen, nothing changed. He clearly felt four sources of size transfer around him, probably the four beefy guys from before. He looked at himself in horror as he was back to the muscle definition he was at before he transferred some to the husky. He now understood why the polar dog was so aroused before, the intense pleasure he got from the size infusion was intoxicating. He could feel his cock grow more and more along his pectorals, reaching ever higher with every second while his whole musculature continued gaining volume and definition. Seeing how trying to press the many buttons wasn't successful in reversing the malfunction, Frank tried forcibly removing the bracelet from his wrist. But he couldn't, it was locked too tightly around his growing forearm. He cursed loudly and tried smashing it, but it had no effect. A huge wave of pleasure hit him, almost sending him to orgasm. It was too much, he couldn't resist it anymore. He had to get off one way or another. And for that, he wanted someone to fuck. Or rather, he desperately needed to fuck someone. He silently apologized to his boyfriend for not getting his consent, but he had to take care of this problem. Now.

Frank grabbed one of the door handles to the shower stalls and opened it. He was face to face with a beefy bear that he recognised as the guy that was playing volleyball earlier. "Perfect", he thought. He stepped in despite the bear's annoyed grunts. He closed the door behind him and grabbed the bear by the wrists. It seemed to accelerate the size drain, which made his already very muscular body bulge out even more. It also made him surge in height and cock length. He overwhelmed the bear with his newfound strength and turned the bear around to push him against the wall. He then prodded his gigantic cock against the ursine man's ass. He shoved two feet in one go, making the two of them moan of pleasure. As he continued pushing his shaft in, he felt the growth accelerate. He got rougher and rougher, pushing and pulling his cock in accelerating motions, completely blinded by lust. His two pairs of balls were now dangling between his thighs and were preparing an explosion of cum. He was humping fast into the bear, pushing and pulling a whole foot every time, making his cock's massive barbs tickle the depths of the bear's belly. His shaft was so much more sensitive than ever before, it was driving him closer to climax. With one last push in, he shoved his whole three foot shaft inside the bear in front of him. His orgasm brought a tidal wave of warm cum inside his partner, every blast was filling the bear, making his belly swell from the sheer amount of seed pumped in him. Despite him reaching his peak, it didn't feel relieving at all; he wanted more and needed more. Cum was still fired in torrents inside the bear, whose belly looked largely inflated now. It eventually reached the point where every wave of seed shot inside the bear was forcing the two of them away from the wall. After a minute long orgasm, his flow finally weakened. He pulled inch by inch his shaft, moaning loudly from pleasure every time one of his cock's barb exited the bear's body. When finally the ursine hunk's body was freed of the cat's shaft, he fell down on his inflated belly.

"Couldn't you two have gotten a room or something? That's gross!" yelled someone.

The voice was coming from the stall next to theirs. Frank grinned as he exited the bear's stall. He looked at himself, he was definitely bigger and buffer than when he came to the beach earlier. It didn't matter to him however, as the only thing that was important right now was to empty his balls, which were already full despite his impressive orgasm from a few moments ago. He didn't care anymore that he was still growing, reaching to 6'9" now with his cock up to nose level and pumpkin-sized balls.

Frank walked to the next stall and knocked on its door. As soon as the lock was undone, Frank forced his way in. He shoved the 7'2 tall muscular gator on the ground, turned him around on his belly, lifted his ass by pulling on the powerful tail of the guy. As soon as there was contact, the theft accelerated and the gator's muscle definition was visibly shrinking while the cat was visibly growing all over. It made Frank so much hornier before that as soon as the asshole of his target was visible, he pushed the entirety of his cock inside. He began rocking back and forth, building a second orgasm very fast. His cock was leaking torrents of pre already, filling the gator with as much of it as he filled the bear with cum before. In a matter of a few moments, Frank had drained all of the gator's musculature, making him add on more definition to his already heavily muscular body while gaining more inches in height, ball circumference and cock length. The humping didn't last long before his cock erupted once again. The flow was so powerful that the gator's belly was swelling at an alarming rate, he was forced off the ground by the sheer amount of cum pumped in him. It only took a few moments before the inflated belly of the gator was grazing the walls all around them. It forced the two of them closer to the stall's door. More cum was pumped in the gator's belly, which was expanding upward now as it had nowhere else to swell to. As finally his orgasm weakened, Frank tried pulling his cock out, but was unable to; the gator was so inflated that he took all of the place, so the cat was stuck in the stall, pinned against its door and with his dick stuck in his victim. He forced himself backward with the new strength in his body, breaking the door behind him. It gave some more room for the gator, whose belly was ballooning above the stall's walls. Frank pulled his cock out and as soon as it freed the entrance of the reptile's asshole, a steady flow of semen began pouring on the sand of the beach.

Frank groaned as he was still nowhere near relieved from the intense pressure of his growing balls. He looked all around in search of his next target; his eyes fell on top of the lifeguard chair where the muscular shark sat. Frank headed there and rocked the chair back and forth to throw his next target on the ground. As soon as his next victim fell on the ground, Frank let go of the chair to go to the shark, who was slightly stunned. He knelt in front of the lifeguard and brought his cock to the shark's mouth before pushing it in without hesitation. The lifeguard's throat was distended from the intrusion of the massive barbed cock. Once again Frank's cock was leaking torrents of pre directly inside his target's belly as he began the rough facefucking. While he was humping in the shark's mouth, he was caressing the shrinking pectorals of the lifeguard while his own muscles were expanding. He rose in height, reaching to seven and half feet and by this point. It once again didn't take him long before he came. His massive spire began spewing torrents of seed once again. In a matter of seconds, the lifeguard's belly was expanding and spilling on the sand of the beach. Frank finally started to feel relief, though it was nowhere near enough to sate him yet. He pumped gallons after gallons of semen inside the shark, who looked more like a beached whale than a shark at this point. The overmuscular cat moaned as his cock shot the last few spurts of cum inside the lifeguard. He slowly pulled his massive shaft out and panted heavily.

The need to empty his balls had partially faded, but Frank still needed more. He headed toward the sunbathing dragon, who was in a perfect position for what the cat had planned. He lined up his cock with the dragon's asshole and rammed it in. The dragon yelped from surprise before moaning from pleasure as his body was stretching around the cat's massive spire. Frank grabbed the winged lizard's legs and pulled on them to help with the fucking. It also enabled a faster theft of the red dragon's muscles, which added to Frank's incredibly muscled frame. The outline of his cock was bulging the dragon's belly, showing every one of its massive barbs through the distended skin. Frank's cock grew in length and width, his barbs elongated, his height piled on a few more inches and his balls expanded until they were completely thigh covering. He now towered over anyone on the beach, reaching to 8'4" tall, with his five foot cock buried deep inside the red dragon's belly. As he was approaching another release, he began humping fast and wildly. He came once again and the dragon's belly expanded like a water balloon. The massive amount of seed pumped into him was too much; it began overflowing from his asshole in a cascade of semen and from his mouth like a hose of cum. In just under a minute, a good portion of the beach was completely covered in feline seed. Frank pulled his cock out. It was reaching well over his head now and was spewing a constant stream of cum.

He looked everywhere on the beach and looked at the aftermath of his experiment. It was supposed to make him look like a femboy, not like the overmuscular bodybuilder he was now. He was still feeling horny and wanted to find another target.

"H-hey..." began the husky from earlier while wagging his tail, "Can I get some too?"

Frank nodded silently. The husky's face lit up and he instantly got on all fours to present his ass to the cat. The feline bodybuilder instantly put the tip of his cock against the dog's asshole and pushed it in. Every barb that slid in made the husky moan lewdly. The constant stream of precum was already inflating his partner nicely, despite the fact that he was nowhere near an orgasm. The husky's belly protruded with the gigantic cock inserted in him. Frank pushed inch after inch inside the eager husky, who was moaning from the intense pleasure. Splats were heard as the dog's cock fired cum all over the sand under him. Frank grabbed his partner's shoulders and pulled them closed to him to help pushing his cock further in, expecting his body to grow from stealing the husky's muscles. But there was no theft of size. He wondered why. He didn't know. He didn't care. It was no time for hypothesizing, it was time for wild sex. And so, he began humping, feeling an orgasm build up once again. Since there was no drain whatsoever this time, his balls didn't overproduce cum as much as before. The fucking went on with the two of them moaning loudly and the husky orgasming a couple times. The cat felt an intense pressure build up in his whole being until finally he reached a true peak of pleasure from this climax. Cum was pumped inside the husky who was in complete bliss from being filled and from working his own cock. The amount of seed fired inside the dog wasn't as impressive as with the other guys before, but it felt much more intense than any other orgasm he had today. Wave after wave fired, making the husky's belly swell with warm feline cum. Frank was panting as his cock continued blasting seed inside the husky. At some point, the polar dog began coughing cum as the excess became too much. An overflow of cum poured from his mouth down on his inflated belly. Frank resumed the thrusting, feeling in complete bliss from this orgasm, which lasted for a good five minutes. Waves became ropes, which became strings until finally his flow stopped. He fell forward on top of his partner, landing on the cum mattress that the dog's belly had become and making the dog spew more seed from the added pressure. He huffed loudly as the relief he had needed so much had finally come. He slowly pulled his gigantic dick out of the hole of the husky, who howled in pleasure as he reached another orgasm from the large barbs tickling his insides once again. Cum flowed out from the dog's gaping hole and splattered on the sand below.

As Frank's cock was finally starting to soften, he raised his wrist in front of his face and took a good look at the device that started his craze. The size transfer bracelet was definitely a failure. Whatever made it malfunction had to be fixed if he wanted to find his femboy build ever again. But on the other hand, he had had on this day the best sex he ever had. He scanned the beach around them to look at the aftermath of this experiment's failure. There were the bear resting on his belly in one of the stalls, the gator whose skin was rising above another stall, the lifeguard shark that looked like a whale, the draconic cum balloon and finally, the husky who was patting his own belly. All of them were leaking feline seed from being overinflated by Frank's horny rampage. The giant cat had to decide if he wanted to fix the malfunction of his bracelet or if he wanted to have some more fun like today. But that would be a question for later. For now, he had to think about how to explain what just happened to his boyfriend.