From my studies of genetics and neuroscience I have come to believe that people fall into four broad personality types - each influenced by a different brain chemical: I call them the Explorer, Builder, Director, and Negotiator.

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

There exists no culture in which adultery is unknown, no cultural device or code that extinguishes philandering.

Romantic love is an addiction.

You fall in love with somebody who fits within what I call your 'love map,' an unconscious list of traits that you build in childhood as you grow up. And I also think that you gravitate to certain people, actually, with somewhat complementary brain systems.

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.

Keep an open heart. We are wired to find love.