-romantic love is a need, want, a craving, a homeostatic imbalance, a drive that arises from primitive regions of the mammalian brain, giving us energy, focus and motivation to win a mating partner-life's greatest prize
-3 systems: lust/sex drive driven by testosterone, romantic love driven by dopamine, attachment seeks a pair bond long enough to stay w a child throughout infantcy
-having sex can facilitate being in love from genitals with dopamine, orgasms for attachment
-need to love is stronger than sex drive
-suicide can be involved when disappointed by love
-series of monagomy-one on one relationships