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

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.

Men have a psychological need to show off their courage and strength. When he sees you talking to another guy, that instinct kicks in and he jumps to protect you and prove he's worthy of your love.

Games are the way we keep romance alive. They're based in human hardwiring. Playing hard-to-get or leaving a little to the imagination allows the woman to be wooed and appreciated and the man to be challenged and intrigued.

Barriers tend to intensify romance. It's called the 'Romeo and Juliet effect.' I call it 'frustration attraction.'

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.

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.

People compose poetry, novels, sitcoms - for love.

Your face and head give more information about you than any other body part.

Any time you choose not to hide your tattoo, you're limiting your social sphere, because they're not popular in big business.

It's almost as if men who get tribal tattoos are trying to signal that they are dangerous, they're to be respected, and they're powerful.

We're not very dangerous animals; we don't have a horn like a rhino or quills like a porcupine.

If we remained perpetually infatuated, we couldn't eat, sleep or work.

Women apparently are quite drawn to men who have differences rather than similarities in their histocompatibility system. They pick it up by smell, and they can pick it up from kissing.

Every time you cuddle with your children, you're likely to be driving down your testosterone.

A Rolex watch or an expensive car are the things guys often use to show status, wealth, and basic desirability.

Experiences shape the brain, but the brain shapes the way we view experiences, too.

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.

I was married and divorced at 23.

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

Women are very attracted to a low voice because it's linked to testosterone, which for millions of years was a sign that men had very good spacial skills and would have been very good at hunting and finding their way back home.

You size up someone physically in less than one second - too tall, too short, too fat, too thin, too old, too young, too stuffy, too scruffy.

Women, it turns out, are built to lead - particularly in the modern world.

We are wired to find love.