Abraham Morgentaler, M.D., F.A.C.S., is an associate clinical professor at Harvard Medical School and director of Men’s Health Boston. An expert in the field of male sexual function and dysfunction, he is the author of The Male Body: A Physician’s Guide to What Every Man Should Know About His Sexual Health (1993) and has published in such prominent medical journals as The New England Journal of Medicine, The Lancet, and The Journal of the American Medical Association.