Good-looking people are always looking for other good-looking people.

Touch is the mother of the senses. Not only are women more sensitive when they touch, but they're also more sensitive to being touched.

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.

Women are naturally prone to compete over their mates.

Women have never been as interesting as they are now. Not at any time on this planet have women been so educated, so interesting, so capable.

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.

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.