By settling I mean marrying the person you are not most attracted to. That there has being a previous someone whom you liked/loved more.

I believe this to be true for both men and women. I still think about my first love and what had felt magical at that time. She was unique (she objectively is one of a kind).

I have talked to a number of girls and it seems a lot of times their most memorable person is their first/second even if she had 8+ relationships at this point.

As we get older and think its about time to get married or get into cohabitation, we end up marrying not our first choice. Thus the arguments, lack of compromise, divorce, breakups...

I think the lack of commitment is having dated too much. We expect our next to be better than our previous ones. When we commit, we feel like we are settling.