Luke moaned as his legs-turned-cock continued to cum gallon after gallon. Tommy and Jake gasped as they realized that the cum was starting to flood Jake's bedroom. "What are we going to do?" they asked each other as they climbed onto Jake's bed, Luke extending his arms and letting his own cum engulf him as he lay on the floor.
"Luke, you need to stop, you've got to stop so mom doesn't find out!" Jake panted, his panic overriding his constant arousal. Tommy nodded fervently and voiced his agreement.
In response, Luke just moaned and rolled onto his stomach, though it appeared his cum-geyser was subsiding. After a few minutes, the geyser had gone down to a trickle before stopping entirely. Luke just lay there in his cum, lapping some of it up while his younger brother and the other young teen watched him nervously.
"That. Was. Indescribable," Luke finally moaned as he pushed himself up to what would have been his knees, sitting with his enormous cock under him. He moaned at the feeling of his cock folded atop itself and shut his eyes. "Bro, I don't know what you did, but my legs feel amazing."
"Y-you don't have legs anymore, Luke," Tommy stammered, his cocktongue also having subsided as he saw what had happened to his friend's brother and bedroom.
"Don't be a dipshit, Tommy," Luke said, still laying back on himself, reveling in the sensations of warm sticky cum all around him.
"No, it's true, just look at yourself!" Jake gasped, pointing at his brother.
Luke opened his eyes and looked down his chest. "Whoa, I'm huge!" he said as he beheld his new muscles. He flexed his arms and abs, running his hands over his chest. He frowned as he continued looking down his body. "Wait, where's my cock?" he muttered. Before Jake or Tommy could respond, Luke's hands went further down and he moaned, realizing touching his hips sent an electric shiver down his spine. "No. Way."
Slowly, Luke leaned back on his arms and pulled his length out from under himself. His cock began to stiffen from the friction and Luke's mouth fell open as he saw his enormous cock expand from his waist like the tail of a snake. He looked up in awe at Tommy and Jake and then back at the cockhead that had once been his feet. It was steadily leaking precum and he moaned as he experimentally rolled it around on the carpet of Jake's bedroom floor.
"H-how is he going to walk?" Tommy whispered to Jake.
"I have no idea," Jakes whispered back.
As if in response, Luke sat up so he was looking down at his cock half. It was just as long as his legs and feet had been, maybe a few inches longer due to his cockhead. He smiled and began rubbing himself, moaning at the new sensations. Soon, he realized he was growing, and looked down to see his legs-turned-cock expanding, growing longer until his cock was at least ten feet long. With a yell, he began cumming and pulled his cock to himself, not noticing that despite his full arousal his cock was now bending like a snake's tail, coiling over itself. His cum shot all over the room, hitting Tommy and Jake square in the face and causing them to swallow some of it in shock before they felt their arousal taking over again.
Inarticulate moans and groans escaped Luke's mouth for only a few moments more as he brought the tip of his "tail" to his mouth and began drinking his own cum, wrapping his mouth around his slit and tonguing the inside of it as best he could. As he drank more and more of his cum, he failed to notice his muscles shifting, getting more toned, his torso and limbs growing slightly longer, his hair growing out as his features became more defined.
Jake and Tommy, meanwhile, were awash in their own ecstasy and began making out. Jake sucked Tommy's cocktongue while Tommy jacked two of his friend's cocks. They both failed to notice their own muscles expanding and their features growing sharper and their muscles more defined. By the time the three boys exploded simultaneously, gone were the teenagers that had entered Jake's room, having grown into sexy young men. Luke now looked to be nearing twenty-seven while Jake had grown into a hunky twenty-year-old and Tommy looked to be a prime twenty-four-year-old. The three young men lay there panting as their orgasms subsided, unsure what they were going to do now.