Cock Snail Transformation

Kevin feels a stirring in his loins after he returns home from his outing... He takes off his clothes as he felt increasing heat and arousal. Soon, he had taken off his briefs too, frantically stroking his erection with both hands. The ripped boy stares at his cock in confusion and fascination as it begins to grow, his rod and balls swelling in size, heightening his excitement. Whatever that was happening, he enjoyed it.

The blue hair didn't even notice when his feet and legs began to shorten and merge together. The soles of his feet began to harden like a shell too. Kevin could only focus on his cock as it took a life of its own, becoming softer and slimier, wriggling around on the floor.  Eye stalks and feelers also extended from the tip of his cock head. His cock head turned back and looked at the boy, they made eye contact and proceeded to make out.

It was a strange experience for Kevin, to be making love to his own cock, despite that, it was exhilarating and erotic. Despite losing control of his man meat, when he licked its head he could still feel it. He aggressively kisses and swirls his tongue around his urethral opening, the sensation almost maddening. He wanted to ejaculate, yet, he couldn't as his testicles and penis had merged into one entity. The boy just continually indulges in pleasuring himself and his cock.

This was the ultimate act of self pleasure.

As the head turned away from the male, a steady stream of clear slime stretches out from the snail cock's mouth. It wasn't long that the muscled boy's wishes came true, he could finally have his release.  With the transformation coming to a completion, the snail creature will expunge the very essence of its host. Boy juice spews out of the cock, causing his body to tremble from delight. After finishing shooting multiple white ropes, his body fully hardens and becomes a shell, his final sensations being that lustful act. The look of sexual stupor forever captured on his petrified face.

Kevin no longer exists, merely the shell of his body. The only thing remaining is his cock, well, cock snail. The creature will now seek out other human males to corrupt with its slime, It'll carry around the torso of what it used to be, showcasing the human that lost control of his mind and cock.