Helen fisher

When you can't have someone but you're not willing to accept that, you try harder and become more extreme about it. Either you win the person back or you drive him away.

We still have community, but we don't seem to have local community. Even in a small town where you know your neighbors and your mother's down the street, they're not in arm's length.

Whether you're married or not, relationships - and the satisfaction tied to them - are extremely important for increasing men's and women's quality of life.

Women are naturally prone to compete over their mates.

Men couldn't care less if your strands are perfectly styled and neat. In fact, he might like you more with some wildness or bedhead, since it shows you're carefree and relaxed.

A woman will toss her head and a man will say, 'Oh she's trying to pick me up,' when in fact she's not doing that at all. So, women actually have to be a little careful with what they do, because men...

For so many generations, a woman's only career path was to marry well and to marry up. Those days have changed.

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

In that early-love stage, you're in that state of exhilaration. You talk till dawn. You become obsessed with 'What does he think?' 'Does he like me?' 'Does he think I'm fat?'

You don't come home from the office to spend time with another job. Hopefully you come home to someone you can have a good time with.