Anthropologist Helen Fisher uses her brain scanning studies (fMRI) of people happily in love, rejected in love and in love long term to discuss the traits of romantic love, love-atfirst-sight and addiction to love. She focuses on her current research on 40,000 men and women to propose that four broad cognitive/
behavioral personality trait constellations have evolved, associated with the neural systems for dopamine, serotonin, testosterone and estrogen. Then she discusses her data on mate choice among 28,000 individuals to propose why we are chemically drawn to one person rather than another.
