Good-looking people are always looking for other good-looking people.

A world without love is a deadly place.

Of all the foods we share, there is nothing more primordial than meat. It's no surprise that meat-eaters still want a partner who will give, receive and share this primordial symbol of a budding partnership.

Real competition can drive up testosterone, which boosts libido.

When you look at the brain regions associated with picking up data from the body, a huge amount of the brain is devoted to picking up information from the lips and tongue.

We evolved in a tropical climate where the smells of plants and flowers were all around us. We spent a lot of time in the trees with a lot of sunlight and no clothes.

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