[One, Two, Middlesboogie]

Tell one of your friends that you adore chocolate. If they offer you any that day, accept it (if you're on a diet, substitute bread, apples, etc). The next day, if they offer you any chocolate, tell them you hate the stuff. The day after that, let them see you eating chocolate. When they say "hey, I thought you didn't like chocolate", you say "of course I like chocolate; I told you so the other day!".

That's a good laugh? I think we all should try it? (nice one Osiris!)