Marty Klein

Marty Klein

Sex Therapist & Public Policy Analyst


Dr. Marty Klein has been a California-licensed Marriage and Family Therapist and Certified Sex Therapist working with individuals and couples for over 40 years. He also runs a program of group and individual supervision for mid-career therapists.

Marty is the award-winning author of 7 books about sexuality, including Sexual Intelligence and His Porn, Her Pain. Marty is a Qualified Forensic Expert providing testimony about sexuality in state, federal, and international courts. He recently gave two U.S. Congressional briefings on evidence-based sex education. 
Marty was the first American clinician to challenge the then-new concept of “sex addiction” in the 1980s and was the first to predict the psycho-social complexities of Viagra in 1998. In 1999, he consulted on a series of trials across the U.S. that successfully challenged various new laws attempting to censor sexual content on the Internet. 
Dr. Klein has trained physicians, psychologists, and policymakers in 35 countries and most American states. He has given keynotes or plenaries at national conferences for AASECT, SSSS, SSTAR, ISSWSH, and other groups. Audiences across the U.S., Europe, and Asia call his trainings practical, thought-provoking, and entertaining. His popular Sexual Intelligence blog is at

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