Well, it's not "cheating" if you're with someone who doesn't mind. So you should make sure to be with someone who doesn't mind. If you don't, then you're really

Well, it's not "cheating" if you're with someone who doesn't mind. So you should make sure to be with someone who doesn't mind. If you don't, then you're really just being shitty and careless, so what is there to be surprised about?