About the Authors: Paul R. Abramson is one of the world's most eminent scientists in the field of human sexuality. He is Professor of Psychology at the University of California, Los Angeles and a former editor of the Journal of Sex Research. He has been a technical advisor to the World Health Organization's GlobalProgram on AIDS and is the author of six books, including Sexual Nature, Sexual Culture and Sarah: A Sexual Biography. Steven D. Pinkerton recently received a doctorate in psychology from the University of California, Los Angeles. Dr. Pinkerton has written extensively in the areas of human sexualityand AIDS prevention and is presently pursuing a broad research agenda in psychology and the behavioral sciences as a post-doctoral fellow at UCLA.