"I wish I had a magic gun that causes its target to turn into two people, one male and one female, who are like identical twins except for their gender. I wish that this gun has the settings I'm thinking of. Also, I wish nobody will think this gun is very strange."
"Settings?" wondered Karyn.
"Right. Memory change, or not. Reality change or not... except for the person firing, of course. Keep the same personality as the original or have an opposite sex version. Keep the same clothes except for size, keep clothes that are as similar as possible without crossdressing, have different clothes. Keep the same hairstyle or not. same thing for makeup. A few other settings."
"So you could zap one person and make him into a guy and girl who keep the guy's old memories but where one thinks like a girl. And the girl is wearing a blouse and skirt in the exact same colors as the guy's shirt and pants, and everyone else remembers there are two people?"
"Or any other combination. Maybe the next time they both think like the original but the girl has makeup and long hair." Jon held up the gun. "Now, how shall I try it out....?"