What does John turn into?

A Masturbation obsessed Goblin

John always is a bit of an unapologetic pervert, and that meant he masturbates to porn all of the time, and one thing that stuck to him recently, was Goblins, green savage gremlins with lisps, but this time with he had the idea to make them full on compulsive masturbators, and John can't be happier at the idea, and he began to imagine the idea in his head, the green blotchy and rough skin, the pointy ears, rows of sharp uneven teeth and a lisp to boot, with the last thing on the list being a big fat cock to compulsively stroke too.

and with a Snap !....