The new book, Bonded by Evolution: The New Science of Love and Connection, by UC Davis psychologist Paul Eastwick, explains what happens when the mist of desirability wears off and compatibility has the chance to chart lasting love and happiness.

Men and women alike are drawn to younger partners, whether or not they realize it. The conclusion came from a University of California, Davis, study of 4,500 blind dates of people seeking a long-term partner.