It's only an open relationship if you're both in on it. Not if you just sleep around. I've never been stabbed in the guts before, but I have had the unfortunate luck of hooking up with a guy just to find out from his very angry boyfriend, girlfriend, husband, or wife that if I ever set foot near him again, I was be stabbed, burned, boiled, disembowled, or forced to sit through Boy Meets Boy on repeat (which is the REAL torture, let's be honest). There is no excuse for cheating. Not one. If you're married or otherwise taken and it's NOT open, you really needn't talk to me.