Decades have passed since we liberated normative sex from the confines of heterosexual marriage. But the divorce of sexual activity from romantic relationships among young people is still the topic of much debate. Both American Hookup: The New Culture of Sex on Campus, by Lisa Wade, and Cheap Sex: The Transformation of Men, Marriage, and Monogamy, by Mark Regnerus, address what’s happening with sex and relationships today; and although they identify similar trends, their analyses could not be more different. Wade’s book is a must-read for anyone interested in today’s young adults or residential college campus culture. The Regnerus book is not worth your time unless you are teaching a methodology course and looking for obvious examples of logical fallacies, misrepresentation of correlation as causation, or ideology barely masked as social science.