"Would you rather, as a man, always have to wear a woman's panties or bra?" Jon read. Karyn started laughing. "Hmm. I think I'll try the panties." Jon felt his underwear shift, changing to a pair of panties.
"These actually feel kind of good," Jon said. He slipped his hands down his pants. "They're kind of tight around my penis, though. Ooh, but they're frilly!"
Karyn laughed again. "What?" Jon asked. "They do feel good!"
"Sorry, Jon," said Karyn. "All right, I'll pick one now." She hesitated. "I just thought of something. Are these things permanent? I don't think you're really going to want to wear panties for the rest of your life."
"Don't worry," said Jon. "I built reversability into the rules set. There's a card that allows you to list your changes on it. If I want to stop wearing panties, I put a check in the 'reverse' box. If I want to keep wearing panties, I don't." Jon pulled it out and showed her. "Once you've entered in all your changes, you sign your name. The reversals occur and you can erase the card to use another time."
"Good thinking," said Karyn. She grabbed a card and read, "Would you rather..."