It's in our genes, we were built to wander.

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.

The human brain is built to compare; it's Darwinian to consider an alternative when one presents itself.

Why do we feel jealousy? Therapists often regard the demon as a scar of childhood trauma or a symptom of a psychological problem. And it's true that people who feel inadequate, insecure, or overly dependent tend to be more jealous than others.

Men don't need linguistic talent; they just need courage and words.

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

When chimps threaten, they open their mouth and show their teeth. It's a little like waving a knife in front of you. It's very primitive, and therefore bizarre.