If you're doing it in the spirit of fun (which I assume to be mutual), this means both of you know how the game works (or that such a game exists). What I mean

If you're doing it in the spirit of fun (which I assume to be mutual), this means both of you know how the game works (or that such a game exists). What I meant was, don't play this with friends who are unaware of this game. If you're starting to put you're friends into social experiments without their previous agreement I'd call you a sociopath.