Men and women are like two feet; they can help each other get ahead.

Young women today do not marry the men they met in high school, or even the one they go out with at college, because they do not need to.

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

Most of us make up our minds in the first three minutes of meeting someone whether there's a potential for a relationship.

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

What our grandmothers told us about playing hard to get is true. The whole point of the game is to impress and capture. It's not about honesty. Many men and women, when they're playing the courtship game, deceive so they can win. Novelty, excitement and danger drive up dopamine in the brain. And both sexes brag.

There's magic to love... Millions of years ago we evolved three basic drives: the sex love, romantic love, and attachment to a long-term partner. These circuits are deeply embedded in the human brian. They're going to survive as long as our species survive on what Shakespeare called, this "mortal coil."