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.

People have often asked me whether what I know about love has spoiled it for me. And I just simply say, 'Hardly.' You can know every single ingredient in a piece of chocolate cake, and then when you sit down and eat that cake, you can still feel that joy.

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

The brain was not built to walk into a bar, where you know nobody, and start a conversation. That's not the way humanity has courted.

Women's worst invention was the plow. With the beginning of plow agriculture, men's roles became extremely powerful. Women lost their ancient jobs as collectors.

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

At first I assumed hate was the opposite of love. But it isn't. The opposite of love is indifference.