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

Scientists know that women gravitate to men who have a different immune system from theirs.

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

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.

Today, American women bear an average of 2.2 children that live to adulthood. Across most of Europe, women bear even fewer young.

The brain was not built to walk into a bar, where you know nobody, and start a conversation. That's not the way humanity has courted.

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.