Humans are natural monogamists right? Not so fast! In their new book, Sex at Dawn: The Prehistoric Origin of Modern Sexuality
, psychologist Christopher Ryan and psychiatrist Cacilda Jethá suggest that monogamy is actually the furthest thing from human sexual nature. Using evidence from anthropology, archaeology, primatology, anatomy and psychosexuality, as well as trends like less people getting married and steadily rising divorce rates, Ryan and Jethá explore the roots of human sexuality and offer explanations for infidelity, decreased passion with the growth of love, and homosexuality. So you’re too sexy for your shirt – how about monogamy?