Until recently, we regarded love as supernatural. We were willing to study the brain chemistry of fear and depression and anger but not love.

In America, we are demanding everything from our marriage.

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.

Until recently, we regarded love as supernatural. We were willing to study the brain chemistry of fear and depression and anger but not love.

Any kind of novelty or excitement drives up dopamine in the brain, and dopamine is associated with romantic love.

In courtship, who wins and who loses will determine who passes on their DNA to tomorrow.

Like most animals, we're wired to associate height with power.