A Rolex watch or an expensive car are the things guys often use to show status, wealth, and basic desirability.

You know, when you've been dumped, the one thing you love to do is just forget about this human being, and then go on with your life - but no, you just love them harder.

When chimps threaten, they open their mouth and show their teeth. It's a little like waving a knife in front of you. It's very primitive, and therefore bizarre.

The only people you and I are likely to know in common are people in the news - politicians, journalists and celebrities.

Any time you choose not to hide your tattoo, you're limiting your social sphere, because they're not popular in big business.

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

I think romantic love evolved to enable you to focus your mating energy on just one individual at a time, thereby conserving mating time and energy.