Romantic love allows you to focus mating energy. Attachment sustains that relationship as long as necessary to raise your baby.

Women like signs of money and education - things that indicate that not only is this guy going to have some resources, but he's also willing to share them.

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

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.

When you're in the throes of this romantic love, it's overwhelming - you're out of control, you're irrational, you're going to the gym at 6 A.M. every day - Why? Because she's there.

Haiti is the poorest country in the western hemisphere; some say the poorest in the world.

Jealousy can even be good for love. One partner may feel secretly flattered when the other is mildly jealous. And catching someone flirting with your beloved can spark the kind of lust and romance that reignites a relationship.