Book excerpt: A generation gap has emerged between parents and their girls. The mothers and fathers of tomorrow’s women have little idea what their daughters are up to sexually or how they feel about it. Drawing on in-depth interviews with more than seventy young women and a wide range of psychologists, academics, and experts, renowned journalist Peggy Orenstein goes where most others fear to tread, pulling back the curtain on the hidden truths, hard lessons, and important possibilities of girls’ sex lives in the modern world.