Jon was sat at home later that night, in his bedroom. He tossed the rock between his hands, wondering what he could do with it. He reached under his bed and got out one of the "adult" mags that his mother new nothing about (or so Jon thought).
He was idly flicking through, when he got a strange idea. He had seen pictures of vaginas, but had never seen one in real life. Jon found a picture of a particularly attractive woman and grasped the rock.
"I wish that, for the next ten minutes," Jon thought he had better add a clause, or he could wish for the wrong thing and be stuck! "I would have this woman's vagina and she would have my penis and testicles."
The rock glowed slightly, and Jon felt a strange sensation in his pants. He pulled down his trousers and his boxer shorts, and sure enough, where his penis had been, was a nicely shaven vagina. Jon looked at the mag. The model was sat there with white lacy lingerie and a penis! Jon rubbed his vagina gently, and got a very strange sensation indeed. Rubbing harder, he found his excitement grow. He continued rubbing harder and harder when the door to his room suddenly flung open and in walked...