Swapping Heads to be Normal

"I've got an idea, Jon," Karyn said, lifting the stone out of her pocket. "I wish that whenever both of us are in public, we will have each other's heads." The stone glowed and Jon saw that while he still had his head, the rest of him was definitely Karyn. And Karyn had her head, but Jon's body. "There. Now we won't be freaks ... in public, I mean."