Coverage progresses from sex and evolution through gender, sexual behavior, pregnancy and childbirth, sexual assault, and sex as a commodity. Learning features include key terms, color photos and illustrations, and boxes on the biology of sex, cultural diversity, research, sexual health, sex in history, and society, values, and the law. The CD-ROM contains review material, exercises, and quizes. LeVay served on the faculties of Harvard Medical School and the Salk Institute for Biological Studies and now devotes his attention to writing. Valente teaches clinical nursing at the University of Southern California. Annotation copyrighted by Book News, Inc., Portland, OR Sexuality is a central but highly controversial aspect of human nature. In this new undergraduate textbook, Simon LeVay and Sharon Valente aim to help students understand the diversity of human sexual expression as well as the various perspectives from which sexuality can be viewed. These perspectives range from biology and medicine, evolutionary theory, cognitive science, social psychology, feminism, and cross-cultural studies to moral and political discourse.