A hundred years ago, if you had a child out of marriage, you'd be a social disgrace. Today women feel comfortable enough economically and culturally to bring up a child without a recognized commitment from a man.

Hair that looks like it's been naturally sun-bleached makes you seem youthful, like you spend a lot of time outdoors. And that appeals to most people.

There exists no culture in which adultery is unknown, no cultural device or code that extinguishes philandering.

Women are better at reading body language everywhere in the world. As a matter of fact, it's associated with the female hormone estrogen. Women are better at figuring out of tone of voice, reading your face and posture and gesture.

Keep an open heart. We are wired to find love.

As women in industrial societies join the paid workforce, they gain the economic means to depart unhappy marriages more easily.

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