David Ley is a clinical psychologist, sex therapist and author, based in Albuquerque, New Mexico. He’s the author of several books and research articles on sexuality, including his controversial books The Myth of Sex Addiction, and Ethical Porn for Dicks, a Man’s Guide to Responsible Viewing Pleasure. Dr. Ley has served as an expert witness in numerous forensic trials regarding sexuality and is a frequent guest in media around the world, with appearances in the New York Times, CNN and Time Magazine, as well as Hustler and Playboy magazines. He trains sex therapists through the Sexual Health Alliance and runs a large behavioral health nonprofit agency in New Mexico.