You've got to remember that men are men and women are women. And although a lot of similarities, there are some real differences.

The human brain is built to compare; it's Darwinian to consider an alternative when one presents itself.

Until recently, we regarded love as supernatural. We were willing to study the brain chemistry of fear and depression and anger but not love.

The main characteristics of romantic love are craving: an intense craving to be with a particular person, not just sexually, but emotionally.

People have been looking for love potions since hunter-gatherer societies.

Romantic love is not an emotion. ... It's a drive. It comes from the motor of the mind, the wanting part of the mind, the craving part of the mind.

Psychologists maintain that the dizzy feeling of intense romantic love lasts only about 18 months to-at best-three years