My hypothesis is that conservative Republicans have very clear values, and when you have that, you're simply more relaxed.

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

Falling in love was not really a choice; it just struck me.

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

Research shows that couples who have a lot of similarities, including intellectual compatibility, end up staying together.

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.

Office romances are few, short, and not usually destructive.