>How promiscuous either of you were at any time before you met will have no bearing on that whatsoever, if you are committed to each other.
The problem is in the fact that commitment doesn't naturally happen from sympathy, or sexual attraction. As fitting two lives is hard, it's a choice which for most people stems from cultural alignments, or hard necessity. If someone's learned behavior is to fly as a butterfly over multiple flowers you can bet with a high probability that culture won't be helpful here. And necessity to stick together for survival is unlikely to exist for modern middle class.
The problem is in the fact that commitment doesn't naturally happen from sympathy, or sexual attraction. As fitting two lives is hard, it's a choice which for most people stems from cultural alignments, or hard necessity. If someone's learned behavior is to fly as a butterfly over multiple flowers you can bet with a high probability that culture won't be helpful here. And necessity to stick together for survival is unlikely to exist for modern middle class.