There are cognitive processes and limbic reactions associated with basic emotions. And you can change brain chemistry, but you're still not going to change memories and experiences in a human being.

Women apparently are quite drawn to men who have differences rather than similarities in their histocompatibility system. They pick it up by smell, and they can pick it up from kissing.

You can really get poked in the back and not feel it very much, but just a feather around your lips and you really do feel it.

I can't conceive of caring more about my president than my own partner.

Research shows that couples who have a lot of similarities, including intellectual compatibility, end up staying together.

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

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.