The Brain's a Body Part, Right?

"I think I know how to fix your problem, Jon."
"I don't think I want you 'fixing' any more of my 'problems'," Jon replied. "Why don't you just give the gun back to me?"
"Hold on a minute," Karyn replied. "I want to try something. I think this device is capable of changing one's body parts even more than simply size, shape, gender, color, and species. I believe the stone interpreted that part of your wish simply as examples of the kinds of changes the gun might make, not as an exhaustive list."
Karyn once again pointed the gun at Jon. Jon looked dazed for a moment, and then Karyn asked, "How do you feel now?"
"Fine," he said. "How should I feel?"
"Just take a look in the mirror and tell me what you think."
After looking in the mirror, Jon said, "I still have the same feet and legs you gave me, but they don't feel or look wrong to me any more. What did you do?"
"Well, I figured that since your brain is a body part, I could change it, too. So I changed your brain to make you feel comfortable with having female parts."
"Then why don't I feel uncomfortable with also having male parts?" Jon asked.
"Because I didn't make you a woman in your brain; I just made you be more accepting of your current form."
"Well, as glad as I am not to be stressing out about my feet anymore, I really wish you hadn't tampered with my brain. That's pretty freaky."
You would be even more freaked out if you knew how much I had tampered with your mind, Karyn thought. It never crossed Jon's mind to try to get the gun back from Karyn. And it never would. She had made it so that, while he knew the gun existed, it would never occur to him that he should or could use it. As far as he was concerned, the gun was Karyn's. It would also never occur to him to get back at her using the stone, although Karyn did allow him to continue to use the stone.
"Come on," Karyn said. "Now that you're over your little hissy-fit, let's go see who else we can use this on."