(Sorry, the last one should have been titled something else)
"I wish that I can swap bodies with Zoe, and back, at will. I wish that while we're swapped, we can act either like ourselves or like the person whose body we have. I wish that we can use the knowledge of the person whose body we have."
"What? I don't want to..."
"Look, Zoe," said Jon. "She likes me a lot more than you right now. This way she isn't really going to do anything bad to you. And if she tries to do it to me I have the stone. If it turns out really bad, just tell me and I'll swap back."
"Well... okay, I guess. Anything to get away from Mom... this is totally the wrong kind of depressing."
Jon put the stone down, then concentrated. His perception suddenly changed--his body felt unfamiliar, black hair was hanging on his neck, and he was looking at himself... he had swapped into Zoe!
Jon picked up the stone again.