Kissing is not just kissing. It is a major escalation or de-escalation point in a powerful process of mate choice.

It's almost as if men who get tribal tattoos are trying to signal that they are dangerous, they're to be respected, and they're powerful.

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

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.

Romantic love is one of the most addictive substances on Earth.

We're apt to fall in love with those who are mysterious and challenging to us.

A lot of people have been romantically in love with somebody who they feel wasn't appropriate to marry.