"Well, how was the shower, hun?" your girlfriend asks after you got out of shower.
"Well, it was refreshing, babe." you reply. "Anyway, I was thinking. How about we play a game for transformations. Whoever wins, get to go first for change the other person into whatever they want for the day or a week. And after that, the other can change back so the other get to change, same rules."
"Hmm... okay, sounds good to me. What game do you have in mind?" your girlfriend questions.
"Well, let's play a game we both know so there is no cheating. How about we play rock paper siccors?" you finish. Then your girlfriend starts,"Okay then. We go on three. One. Two. Three..."