Jake scrolled Tumblr late at night, cock already half-hard in his shorts from the endless feed of hairy muscle growth stories. One post after another showed guys blowing up with thick slabs of muscle, bodies sprouting dark fur across chests, abs, backs, and asses until they looked like beasts. He rubbed his dick through the fabric, reading how their cocks thickened and their balls hung heavier while they fucked each other senseless.
The next morning his skin itched. By lunch his t-shirt felt tight across his shoulders. Jake stripped in the bathroom mirror and watched his chest swell outward, pecs pushing forward while coarse black hair pushed through the skin in dense patches. His arms thickened, veins popping as biceps ballooned. A low growl escaped his throat when his abs carved themselves into a hard eight-pack and a thick treasure trail raced down to his crotch. His cock lengthened and fattened, hanging heavy and veined, the head already leaking. Balls dropped lower, covered in the same wiry hair now coating his spreading thighs and ass.
By evening Jake was a different man. Six-foot-three, two hundred and eighty pounds of solid muscle, every inch covered in thick, dark hair that curled over his chest and down his stomach. He flexed in the mirror, watching his hairy pecs bounce, then reached back and felt the new fur between his ass cheeks. His hole twitched. He needed to fuck.
A message popped up from a Tumblr user who went by BearGrowth: Saw your new pics. My place. Now.
Jake didnt bother with clothes that fit. He pulled on a tank that rode up his furry abs and shorts that strained around his thick thighs and heavy cock. At the guys apartment the door opened to another transformed stud, just as big, just as hairy, beard thick and eyes hungry.
Fuck, you grew fast, the man said, voice deep. He grabbed Jakes crotch through the shorts and squeezed the fat cock. Get in here.
They didnt make it past the living room. Jake shoved the man against the wall, yanking his shorts down to free his own massive, hairy dick. The man dropped to his knees and swallowed it in one go, throat stretching around the thick shaft while his tongue dragged through the dense pubes at the base. Jake thrust hard, fucking the wet mouth, balls slapping the bearded chin.
Turn around, Jake growled. He spun the man, bent him over the couch, and spread the hairy cheeks. The hole was pink and twitching under the fur. Jake spat on it, rubbed the head of his cock against the slick opening, then shoved inside. The man grunted as Jakes thick dick sank to the root, stretching him wide. Jake started pounding, hips slapping against the furry ass, every thrust making the mans own cock leak onto the cushions.
They switched positions on the floor. Jake lay back while the man straddled him, sinking down on the fat cock until his hairy balls rested on Jakes abs. He rode hard, muscles flexing, sweat mixing with the thick body hair. Jake reached up and twisted the mans hairy nipples, pulling him down for a rough kiss, tongues sliding while their cocks rubbed together between their hairy stomachs.
Jake flipped them again, pinning the man on his back and hooking his legs over his shoulders. He drove in deep, pounding the prostate until the man shot thick ropes of cum across his own hairy chest. Jake followed seconds later, burying his cock to the balls and flooding the hole with heavy pulses of cum that leaked out around his shaft.
They stayed locked together, breathing hard, bodies slick and hairy and huge. Jakes muscles still felt like they were humming, growing even as they fucked. The man grinned up at him, cum-smeared and satisfied.
Round two in the shower, he said. Then were posting the video.
