Jake slammed the door to his apartment and kicked off his shoes. Another shitty date with another boring chick who wanted nothing but small talk. He was twenty-eight, decent looking, but his sex life sucked. That night he found a weird bottle in his mailbox, no label, just a note saying "Try me if you're ready for real change." Probably spam, but he was drunk enough to chug half of it.
The burn hit fast. Heat flooded his gut and spread down to his balls. Jake groaned and grabbed the kitchen counter. His dick twitched in his jeans, getting hard for no reason. He yanked his pants down and stared. It was already bigger than usual, veins popping out thick and dark. "What the fuck," he muttered, but the words came out deeper, rougher.
His chest tightened. Muscles swelled under his shirt, shoulders broadening. Hair sprouted thicker on his forearms and abs. The real shock came lower. His cock kept growing, inch after inch pushing out until it slapped against his thigh, heavy and throbbing. It had to be ten inches now, maybe more, the head flared wide and leaking. His balls hung fuller, tighter.
Jake stumbled to the mirror. His face looked sharper, jaw stronger, eyes darker with something hungry. The straight guy who got off to straight porn was gone. All he could think about was cock. Big, thick, veiny cock. His own felt alive, pulsing with every heartbeat. He wrapped both hands around it and stroked once. Pre-cum poured out in a steady drip. "Shit, it's so fucking huge," he growled, voice gravelly.
The transformation kept going. His ass clenched and rounded out, firm and fuckable. A new ache bloomed deep inside, like his hole was waking up and demanding to be filled. Jake dropped to his knees right there on the floor, still jerking his monster dick. Images flashed in his head: men, sweaty and rough, shoving their cocks into him or bending over for his. He needed it now.
A knock at the door startled him. It was his neighbor, Marcus, the tall Black guy from down the hall who'd always made Jake feel weirdly nervous. Marcus stepped in when Jake opened the door, eyes going wide at the sight. "Dude, you okay? You look… different."
Jake didn't answer with words. He grabbed Marcus by the shirt and shoved him against the wall, mouth crashing down hard. Tongues fought. Marcus tasted like beer and heat. Jake's massive cock pressed against Marcus's thigh, rock hard and leaking through his briefs. Marcus pulled back just enough to stare. "Holy shit, that's real?"
"Touch it," Jake ordered, raw and direct.
Marcus dropped to his knees and freed Jake's cock. It sprang out, slapping his face, way too big for one hand. Marcus licked the head, tongue swirling over the slit, tasting the steady flow of pre-cum. "Fuck, it's massive," he moaned, then opened wide and took the first few inches. Jake thrust forward, feeding more down Marcus's throat until he gagged. Spit ran down the shaft. Jake grabbed Marcus's head and fucked his mouth in short, dirty strokes.
Marcus pulled off gasping. "I need that in my ass. Now."
They stripped fast. Marcus bent over the couch, ass up, hole already twitching. Jake spat on his own cock and lined up. The head pushed in slow at first, stretching Marcus wide. "Goddamn you're tight," Jake grunted, then slammed the rest in with one thrust. Marcus yelled, but pushed back for more. Jake's huge cock disappeared inside him, balls slapping skin with every brutal pump.
They fucked like animals. Jake pounded deep, angling to hit that spot that made Marcus shake and curse. Sweat slicked their bodies. Jake reached around and stroked Marcus's cock in time with his thrusts. "You love this big gay dick, don't you?" he snarled.
"Yes, fuck, fill me up," Marcus begged.
Jake came first, roaring as his cock swelled and pumped thick ropes deep inside Marcus's ass. The load was huge, spilling out around his shaft. Marcus followed right after, shooting across the couch while Jake kept thrusting through the aftershocks.
They collapsed together, breathing hard. Jake's body felt settled now, the transformation complete. His cock softened but stayed impressive, hanging heavy between his legs. Marcus looked up with a grin. "Round two in the shower?"
Jake was already hard again. The night was just starting.
