Helen Fisher

Most of us make up our minds in the first three minutes of meeting someone whether there's a potential for a relationship.

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.

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

Psychologists maintain that the dizzying feeling of intense romantic love lasts only about 18 months to - at best - three years.

Love is not an emotion; it is a drive.

Men fall in love faster than, and just as often as, women.

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

People compose poetry, novels, sitcoms - for love.

You can be instantly scared. You can be instantly happy. So why can't you be instantly romantically in love? I think when it happens, it's because you are ready to fall in love.

There's more than one person on the planet. When you're madly in love, that's not what you think.

We are wired to find love.

Anthropologists have found evidence of romantic love in 170 societies. They've never found a society that did not have it.