There is more and more data indicating that there is a biological basis to your political views.

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.

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

There's biology in everything, even when you're feeling spiritual.

The Internet lets women use words, which is their natural tool. Little girls speak in more complex, grammatical sentences than little boys do, and women never lose that superiority in verbal ability.

There's all kinds of reasons that you fall in love with one person rather than another: Timing is important. Proximity is important. Mystery is important. You fall in love with somebody who's somewhat mysterious, in part because mystery elevates dopamine in the brain, probably pushes you over that threshold to fall in love.

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