Both sexes like the exercise and challenge of sports, but for men it's also a basic display behavior for impressing and winning a mate.

At first I assumed hate was the opposite of love. But it isn't. The opposite of love is indifference.

I think romantic love evolved to enable you to focus your mating energy on just one individual at a time, thereby conserving mating time and energy.

Men are so visual, they see a woman who appeals to them physically, and it will trigger the romantic love system faster.

Neither gender is routinely more jealous - although women are more willing to work to win back a lover, while men tend to flaunt their money and status and are more likely to walk out to protect their self-esteem or save face.

Sometimes we fall in love with somebody who will probably never love us, for reasons having nothing to do with us but with their own mindset, their chemistry.

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