"What about this?" Jon asked, gesturing at his newly feminized body. "You''re starting from normal, so why can''t I?"
"But you didn''t guess, so you have to keep it! Don''t worry. It''ll wear off in a about another minute," Karyn replied.
As if on cue, Jon''s clothing and body returned to normal.
"Of course, that is an interesting point. What do you say that the wishes should all last until either guessed, reversed on cue, or the end of the night," Karyn began.
"Sounds fun!" Jon grabbed the rock and headed for the door.
"Wait!" Karyn called out as he turned the knob. "Let''s raise the stakes. Make them last a week, but our memories return to normal at the end of the night. That way, we're stuck with any unguessed, unreversed changes for a week."
Jon thought about this. Well, if nothing else, it'll be interesting. Why the hell not?
"You're on!" Jon exclaimed, and he confidently strode out the door. What should I wish for? Jon thought...