You fall in love with somebody who fits within what I call your 'love map,' an unconscious list of traits that you build in childhood as you grow up. And I also think that you gravitate to certain people, actually, with somewhat complementary brain systems.

Romantic love allows you to focus mating energy. Attachment sustains that relationship as long as necessary to raise your baby.

For so many generations, a woman's only career path was to marry well and to marry up. Those days have changed.

[Women] tend to collect more pieces of data when they think, put them into more complex patterns, see more options and outcomes. They tend to be contextual, holistic thinkers.

Women have a better sense of smell than men do, and it's even sharper in the middle of their menstrual cycle, when estrogen levels peak and women are more likely to be deciding whether a man's attractive.

Romantic love is an addiction.

You can really get poked in the back and not feel it very much, but just a feather around your lips and you really do feel it.