Originally Posted by CielDuMatin
Tonberry, I'm sorry, but I have to disagree with you. I think that it's vital that each relationship come up with a very explicit definition of the rules of the relationship to determine exactly what is and isn't considered "cheating".
Emphasis mine. Yes, I agree with that. My point is that there isn't a definition that's the same for every relationship ever, and doesn't require people to talk about it beforehand.