"You know what Jon? I wish you were more like Karyn and Vicki here and you just wanted to help me have a good time." The stone glowed. Pete froze, as he realized that he had just made a wish. One that couldn't be reversed.
Fortunately, the wish didn't change Jon the way Pete thought it would. Jon looked exactly the same as he always did. But what changed? Pete looked over at Karyn and Vickie. They were still kissing each other. He turned back to Jon and smiled.
"Hey, Jon. You think it's a good idea to play with your penis."
Jon displayed a look of disgust, but after about ten or so seconds, he plunged his hands into his pants and began to play with himself.
Pete could now make Jon do things through suggestion, just like Karyn and Vickie.