I was married and divorced at 23.

We spend our lives trying to get along with people so we can keep our jobs, keep our marriages together, so that we can raise our kids properly.

Men tend to be hierarchical, but women are driven to make lateral connections so they can cooperate.

Women like signs of money and education - things that indicate that not only is this guy going to have some resources, but he's also willing to share them.

If we remained perpetually infatuated, we couldn't eat, sleep or work.

There's a lot of talk about the positive aspects of love. We as a society downplay the danger, the anxiety, and the disappointment. We romanticize romance.

Men want to think women don't cheat, and women want men to think they don't cheat, and therefore the sexes have been playing a little psychological game with each other.