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

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

We spend our lives trying to get along with people so we can keep our jobs, keep our marriages together, so that we can raise our kids properly.

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

I can't conceive of caring more about my president than my own partner.

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

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.