It’s a lot easier to deceive both oneself and a partner about cheating when the rules are not clear.
My opinion is YES, reason being If you're in committed relationship, then why the hell you be looking for someone else?
Cheating is also problematic because couples rarely discuss exactly what their expectations are.
In any given relationship, what one person considers to be acceptable may differ from what a partner thinks is appropriate.
Is it rude to not at least reach for our wallets when the bill comes?