The following is going to sound like a tangent, but I think it’s inextricably related -
No one knows how to be married. Well, almost no one. Everyone gets all worked up about sex (or lack thereof) inside and outside of marriage, in the media, in schools, etc., but while everyone is all worked up about sex, no one is talking about relationships. “No problem!” you say. “Everyone has examples of healthy relationships to look to - just look at your parents!”
Well, most people are in a position where they can’t even look to their parents as an example. Besides, even if your parents have a healthy marriage, that doesn’t mean that their marriage is anything that would work for you. So what else do we have as an example of a healthy relationship? The media! Lots of great examples there - 1950’s Disney movies (or, frankly, most modern romantic comedies) with 2-dimensional princesses that accept abusive behavior with a smile and wait for a prince to solve all their problems. Or Twilight - that’s a great one. Inexplicable devotion to an emotionally abusive vampire. Or the usual lesson that choosing infatuation (and calling it “love”) in the face of all the circumstancial red flags that would deter most normal, sensible people. (So what if he’s in jail? I love him!)
And then on the other extreme, we have a constant reminder that “marriage is sacrifice; marriage is sacred; marriage is forever.” Okay - great. Do you realize how easy domestic abuse becomes when one partner espouses that viewpoint … and the other spouse knows it?
My point - rampant cheating is bad enough in itself because of all the pain it leaves in its wake. But it is a symptom of a much deeper, more corrosive problem - mass emotional and relationship illiteracy. If we fix that problem, all the arguments about sex will be seen for what they are - petty squabbling.