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Your Brain On Porn

Marty Klein

PhD, Human sexuality
Private practice, Forensic expert, Therapist educator

Dr. Klein has been a Licensed Marriage & Family Therapist and Certified Sex Therapist for over 35 years. He is the award-winning author of 7 books about sexuality, including the recent “His Porn, Her Pain.” Required reading at several universities, the book critiques the common mistakes that policy-makers, therapists, and couples make about pornography—and suggests innovative ways to enhance our political, cultural, and personal Porn Literacy. Dr. Klein is an Expert Witness in state, federal, and international courtrooms. He also trains psychologists, physicians, attorneys, and clergy across the U.S. and internationally.

Photo: Neal Preston

Photo: Neal Preston


Nicole Prause

PhD, Clinical Science

Dr. Prause is a sexual psychophysiologist and licensed psychologist with specialized training in neuroscience and statistics. She has nearly 20 years running laboratories publishing over 50 peer-reviewed papers in sexuality and addictions. She also trains sex therapists in cutting-edge, technology-based interventions.

Pornography relapse

David Ley

PhD, Clinical Psychology
Private practice

Dr. Ley has published books "The Myth of Sex Addiction" and "Ethical Porn for Dicks”, in addition to peer-reviewed papers concerning the clinical and legal status of sex film viewing.

Your brain on porn

Samuel Perry

PhD, Sociology
University of Oklahoma

Dr. Perry studies the intersection of religion and sex film use, including the role of masturbation, using surveys.

Your brain on porn

Taylor Kohut

PhD, Psychology
Western University

Dr. Kohut studies the impact of sex film viewing on romantic relationships, adolescents, and individuals using both survey and experimental approaches.


William Fisher

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Peter Finn

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Real your brain on porn

Janniko Georgiadis

PhD, Neuroscience
University of Groningen

Dr. Georgiadis is an expert in the neuroscience of pleasure, including fMRI and other experimental approaches.

Real your brain on pornography

Erick Janssen

PhD, Psychology
University of Leuven

Dr. Janssen is in the department of neurosciences and uses sex films to study the physiology of sexual arousal in laboratory experiments.

Real your brain on pornography

Aleksandar Štulhofer

PhD, Sociology
University of Zagreb

Dr. Štulhofer developed the first sex education curriculum for Croatia and studies the impact of sex film viewing on adolescents using surveys.

Your brain on pornography

James Cantor

PhD, Clinical Psychology
Private practice

Dr. Cantor studied the neuroscience of pedophilia.

Your brain on pron

Michael Seto

PhD, Clinical Psychology
University of Ottawa

Dr. Seto is the editor in chief of Sexual Abuse, the official journal of the Association for the Treatment of Sexual Abusers, and publishes extensively in peer-reviewed journals concerning the predictors and characteristics of sexual abusers.


Justin Lehmiller

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Pornography addiction

Anna Randall

DHS, LCSW, Sexology, Social Work
The Alternative Sexualities Health Research Alliance

Dr. Randall (pronouns she/her/hers) is the executive Director of TASHRA, The Alternative Sexualities Health Research Alliance (, a national nonprofit research and professional training organization. Known for their research publications on Kink and BDSM sexuality, TASHRA works to increase the scientific knowledge on the lived-experienced of sexual minorities. As those with kink interests and identities are stigmatized, marginalized, misunderstood; they may not receive culturally competent healthcare. Adding to this, individuals of color, orientation, gender non-confirming and those already struggling to survive, experience additional minority stress. To bridge this gap, TASHRA trains various healthcare professionals in the provision of compassionate and knowledgeable care. She holds a Doctorate in Human Sexuality and Masters in both Social Work and Public Health. She is a licensed clinical social worker with a Silicon Valley private practice and specializes in sex therapy.

Ted Talk Porn

Victoria Hartmann

PhD, MPH, Sexology, Public Health
Erotic Heritage Museum, Las Vegas

Dr. Hartmann holds a Ph.D. in Human Sexuality with an emphasis on Clinical Sexology, as well as a Master in Public Health. Her primary focus is forensic sexology, and the preservation of erotic artifacts, including the archiving of sexually explicit films. Her Doctoral work centered on the effects of dark web violent and explicit films. She authored the book "I Like Dead People - Inside the Mind of Death Fetishists" based on her doctoral thesis, and has proposed a new theoretical framework for classifying paraphilias. She is the current Director of the Erotic Heritage Museum in Las Vegas.

Porn research

Michael Vigorito

MA, Counseling
Private practice

Mr. Vigorito is a licensed Marriage & Family Therapist, certified sex therapist, and co-author of Treating Out of Control Sexual Behavior - Rethinking Sex Addiction.

Ted Talk Porn

Roger Libby

PhD, Sociology
Private practice

Dr. Libby is an AASECT certified sex therapist and a couples counselor in Seattle. He is the author of The Naked Truth About Sex and Sex from Aah to Zipper. He completed postdoctoral fellowship in family violence researching the relationship between sex and violence. He gave a TEDx Talk on the need for a sex positive revolution and is known for coining the term “sex positive” in 1976.

Ted Talk Porn

Doug Braun-Harvey

The Harvey Institute

Sexual health author, trainer and psychotherapist Douglas Braun-Harvey bridges sexual and mental health and facilitates organizational change. In 2013 Doug Braun-Harvey and Al Killen-Harvey co-founded The Harvey Institute, Since 1993 he has been developing and implementing a sexual health based treatment approach for men with out of control sexual behavior (OCSB). His new book “Treating Out of Control Sexual Behavior: Rethinking Sex Addiction” written with co-author Michael Vigorito was selected as the 2018 Health Professional Book by the Society for Sex Therapy and Research (SSTAR). Previous publications include “Sexual Health in Recovery: Professional Counselor’s Manual” (2011) and “Sexual Health in Drug and Alcohol Treatment: Group Facilitator’s Manual” (2009).

Mr. Braun-Harvey is Licensed Marriage and Family Therapist, Certified Sex Therapy Supervisor and Certified Sex Therapist. He is honored, as an alumnus of the University of Minnesota, to join their Leadership Council for the Program in Human Sexuality in which he is a founding donor of the Doug Braun-Harvey Fellowship in Compulsive Sexual Behavior. He has been providing individual and group therapy in his San Diego private practice since 1987.


Alan McKee

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David Hersh

Hersh Centre for Sexual Wellness

Dr. Hersh is a psychotherapist and Licensed Marriage & Family Therapist for 50 years. He is also a Certified Sex Therapist in private practice.

Your brain on porn

Jennifer Valli

PhD, Clinical Sexology

Dr. Valli is an AASECT certified sex therapist and clinical sexologist. She is an advocate for sexual diversity in the bible belt in her roles as educator and therapist.

Pornography addiction

Jason Winters

PhD, Clinical Psychology
Private practice

Dr. Winters conducted peer-reviewed, published research on hypersexuality before transitioning to private practice as a Registered Psychologist in Canada. He's co-founder and director of the West Coast Centre for Sex Therapy.


Chris Donaghue

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Charles Moser

Private practice

Charles Moser, PhD, MD is board certified in Internal Medicine by the American Board of Internal Medicine, HIV Medicine by American Academy of HIV Medicine, and is a Fellow of the European Committee of Sexual Medicine (FECSM).   His private practice is devoted to Sexual Medicine (the sexual aspects of medical concerns and the medical aspects of sexual concerns). He has authored or co-authored over 90 scientific papers or books, he has written extensively on sexual medicine, gender diversity, hypersexuality and the paraphilias including BDSM.  He is Founder and President of Diverse Sexualities Research and Education Institute, a 501(c)(3) charity. View his complete CV.

Watch here for a forthcoming news story about one activist attempting to violate free speech by threatening scientists and therapists speaking about their own areas of expertise.