This is a tough one, because there is no right answer for everyone. I've known many couples whose presence makes me ask (to myself) "why are they together?" or "why did they get together in the first place?" I can't really judge because my first two marriages were the same, and I had "side chick" thoughts when with them. But my present marriage has gone on for 39 years, and I've never once had the "side chick" thought. We've had many bad times. The difference between the marriages is that I and my current wife talk constantly, even about the most sensitive subjects, and the rule for both of us is that we don't point the finger until we have examined ourselves to see if we are the problem. This is a formula that has worked for us, but that doesn't mean it would work for everyone. My wife and I know that we're together for the duration, whether we like it or not, but that could never have been so with the first two wives. Sometimes, divorce is necessary and preferable, but first there must be the talking.