Ryan decided to become the dick of Liam, the boys' next-door neighbor. He was tall, blond, muscular and very sexy. He had the perfect body, and Ryan thought it would be cool to be his penis.
Ryan stripped down and jumped the fence, and going through the back door to Liam's house. (It was unlocked.) He tiptoed up the stairs to Liam's room. Liam had just came from football practice, so he was sleeping. Ryan walked over to the bed where Liam slept. And as befitting a football jock, he was naked. Ryan, as if in a trance, walked up to the bed and pulled the sheets away. Liam's muscular body glistened in the sunlight, and as Ryan watched, Liam's penis slowly started to stiffen, and became erect. Ryan leaned forward onto the bed, placing one hand on Liam's arm, and tentatively moved his other hand towards Liam's cock, but then withdrew back. This was too weird.
Suddenly, Liam awakened. Ryan backed up, walking into the wall of Liam's room. Liam sat up, and stared at him for a moment.
"What are you doing?" he asked.
"I... uh..." Ryan stuttered.
"Aren't you going to get close to me?" Liam asked.
"Wha...What?" Ryan stammered.
"Come over here." Liam said. "It'll be easier if we're both lying down."
Ryan was understandably confused. But, since one of his fantasies appeared to be coming true, he did as Liam said.
"I can't wait for you to join me." Liam softly said once Ryan had made his way back to the bed. He took Ryan's hand, and guided him onto the bed. Ryan couldn't believe what was happening. Liam positioned Ryan so that his naked ass was right above Liam's throbbing cock.
"You're ok with this?" Ryan asked, tentatively.
Liam, still holding Ryan's hand, moved it down and wrapped it around his penis. Ryan felt the strong tingling feeling all over his body as soon as his hand made contact with Liam's skin.
Almost instantly, Ryan's asshole began to stretch, growing in diameter, until it was at least twice it's original size. Ryan flexed his ass muscles, and his asshole opened wider than it ever had before, inhumanly so. Ryan slowly began to sit down on top of Liam's chest, Liam's penis going inside of him. As it did, his asshole began to close off, shrinking back down to it's original size. And then, although neither boy could see it happen, it disappeared, merging with Liam's shaft. Although they did not see it happen, both of them felt the moment when their two bodies became one.
Liam began to move his hands up and down Ryan's torso and arms, then up his neck, and his face. Ryan groaned in pleasure, his entire upper body feeling incredibly sensitive to the touch, sending waves of pleasure down him, waves that Liam could now feel as well. Ryan was so lost in pleasure that he didn't notice his own penis and testicles slowly shrink and draw up inside of his crotch, leaving smooth skin where they previously had been. All the hair on his body sucked underneath his skin and disappeared.
Ryan then started to shrink ever so slowly. His legs began to draw up closer to his torso, the base of which was beginning to round outwards into a cylindrical shape. His abs and belly button melding into his body, Ryan's torso began to stiffen and prohibit movement, and he began to hear a dull pounding that seemed to be coming from all over the room at once. He thought for a moment and realized that it was the throb of Liam's heart, sending blood pumping into his own body to facilitate his erection. His feet melded into the base of his dwindling legs, leaving a light dusting of hairs on the ends. He could feel the bones and muscle in his legs melting and reforming into pockets, tubes and veins. He could feel inside his legs, as his pockets began to fill with a familiar gooey substance. The substance, warm like it was cooking in an oven, heated his legs as they shortened even further, drawing up almost to the base of his now rounded waist, until they stopped. Gravity took over, and his legs slid ever so slightly across Liam's sweaty skin, sending another wave of pleasure to both boys.
As Ryan's torso shrank, Liam began to rub it more consistently, paying attention to Ryan's now rounded waist. Ryan could feel a tube that connected within his legs to his pockets, and also connected deep within Liam's body create pressure around where his asshole would have been. The tube stretched up into Ryan, his intestines and organs melding into it, bones dissolving. His stomach and throat melded with the tube, and Ryan could feel the gooey substance in his leg pockets begin to move up the tube with each stroke of Liam's hands on his torso, slowly moving up and up, closer to his mouth. In the waves of pleasure, he had pressed his arms against his body so that Liam could rub them as well, and now they slowly began to merge into his upper body.
Ryan's torso, slowly shrinking and only rounded at the waist previously, began to morph. His nipples smoothed over and what remained of his chest bones dissolved under his skin. The front and back of his upper body stretched outward slightly, pulling the rest of his chest and back into a cylindrical shape. Large veins began to appear under his skin, out of proportion with his current size, but not for long.
Now that his head was the only human part of his body, and he had shrunk to around 11 inches in length, Liam could wrap his hand around most of Ryan and rub even more. The semen that had been formed in his balls was at the base of his former torso now, and rising. Ryan began to taste something funny in his mouth. It was a salty substance, not as gooey as the semen that was rising through his shaft, but of a similar taste. As it built up in his mouth, dissolving his teeth and tounge, Ryan began to drool slightly, the warm liquid landing on Liam's thigh.
Now, for the final stage of his transformation, Ryan's hair sucked into his head. He threw his head back, and then found he couldn't roll it back forward. No matter though, he could feel his neck sinking into his torso, the skin of his neck expanding into the beginnings of Liam's foreskin. His head began to change shape as he could feel the liquid rising into his chest. Soon, he would be Liam's penis, and they would be together in the most intimate way Ryan could imagine for as long as the two of them wanted. As his head extended upwards, his face migrated to the tip of it, his cranium now in the shape of a stretched mushroom head. What had been his jaw was in the process of softening, slightly extending outward and differentiating itself from his shaft. His nose softened next, pulling forward into the tip of his head and the distance between his eyes and mouth decreased as his mouth began to migrate to the very tip of his cockhead, leaving a slight indent in the skin beneath it as it moved and creating the familiar penis shape.
Liam's cum was at the base of Ryan's head now, Ryan thought, only a few more seconds of this before... before....
Now 8 inches, Ryan could feel it coming, and he closed his eyes. Just as his eyes smoothed over, his head stretched upwards once again, finally creating a cockhead that matched Liam's original penis. Liam groaned with pleasure as Ryan ejaculated, and the sensation of their orgasm sent waves of even greater pleasure through the bodies of both of the boys. Semen rocketed out of Ryan's mouth, and although he no longer had a tounge, he could taste every bit of it. But there was a sweetness to the saltiness now that he had never experienced it before, and he loved the taste, only wanting more. And Ryan, whose balls were filled with semen, continued to ejaculate and cum for what seemed like minutes before his semen began to slow, then stop oozing from his tip.
Liam was covered with sweat, having just had what was probably the greatest masturbatory session of his life. He only hoped that no one had heard anything. He reached underneath the bed for his towel, and wiped Ryan off. That evening, he would have to put Ryan to use, Liam decided. Ryan, happy in a way he had never imagined he could be, began to shrink now, softening. He loved being Liam's penis, and he knew that Liam would be using him for an even better purpose in a matter of time. He felt tired now though, and as the growing foreskin around him slowly covered his head, he found in his new darkened surrounding a lovely place to rest.