Women spend their lives trying to look good for men. So a woman who feels she's sending the right visual signals is pleased with herself.

People compose poetry, novels, sitcoms - for love.

Why do we feel jealousy? Therapists often regard the demon as a scar of childhood trauma or a symptom of a psychological problem. And it's true that people who feel inadequate, insecure, or overly dependent tend to be more jealous than others.

You can get into a very fancy car and know everything about the engine, but when you drive in that car, you feel that rush. In the same way, I think the more you know about love, the more you can enjoy it. And knowing about your personality type, who you are and what kind of person you're dealing with gives you a great leg up.

Blushing is thought to be linked to increased levels of norepinephrine in the brain, which may be associated with romantic feelings. It signals that we are interested and excited, which is attractive to men.

Despite the myth that men are less committed, they are predisposed to desire marriage.

Saliva has testosterone and estrogen. When you kiss, you're having a chemical experience.