Plays Well in Groups provides a historical and cultural history of group sex throughout the ages. From depictions in Paleolithic cave art to the Playboy mansion, Katherine Frank delves into the fields of sociology, biology, anthropology, and psychology to provide explanations for both, participation in group sex and the complex reactions to it—from fascination to fear. This book draws on survey research, ethnographic observation around the world, and interviews with participants to offer a cross-cultural look at the manifestations and meanings of group sex; who has it, and why.