Love at first sight...the copulatory gaze...dinner dates...jealousy... intimacy... homesexuality...infidelity...Dr.Helen Fisher, an anthropologist at the American Museum of Natural History, explains it all in this four-million-year history of the human species. She demystifies much about romance and pairing that we tend to believe is willfull or just plain careless. She offers new explanations for why men and women fall in love, marry, and divorce, and discusses the future of sex in a way that will surprise you.