• Freein13

The Great Porn Experiment

Excerpts from the book “Your Brain on Porn”



Gary Wilson, author of the book “Your Brain on Porn” and the creator of the website by the same name gave a 16+ minute TedXGlasgow talk on May 16, 2012, which as of this writing has over 11,315,000 views. Here are some of the facts from his talk:


Today’s Internet

  • Most boys seek pornography by age 10 - Simon Lajueunesse PhD

  • The Difference between pornography of the past and today - Unending Novelty

  • Today’s pornography is as different from that of the past as playing a video game is to playing checkers

  • “Real Sex” involves courtship, touching, pheromones, emotional connection, and interaction with a person

  • Researcher Simon Lajueunesse could not find an appropriate size study group of college age students because “Guys who do

  • not watch porn don’t exist”

  • Today’s teens start on pornography when their brains are at the peak of dopamine and neuroplasticity


Pornography and the Brain

  • The brain reward circuit is set for natural rewards and has a natural satiation mechanism

  • The Coolidge Effect - Dopamine surges when viewing novel mates or scenes

  • Heavy user’s brain becomes accustomed to and seeks constant novelty

  • Dopamine surges activate the molecular switch known as DeltaFosB, which accumulates in the brain’s reward circuit.

  • Chronic consumption of drugs or natural rewards causes the build of DeltaFosB and can alter the brain promoting a cycle of

  • and craving

  • The brain changes include numbed pleasure response, hyper-activity to porn, and willpower erosion

  • All addictions share these same brain changes and the action of DeltaFosB

  • All brain research indicated that the constant novelty provide by the internet can cause addiction

  • Extreme versions of natural rewards (pornography, high calories foods) provide excess dopamine, which overrides our natural satiation mechanism


Medical Effects

  • Symptoms of arousal addiction mimic ADHD, social anxiety, depression, and OCD

  • Physicians frequently misdiagnose these conditions as their primary problem rather that a secondary due to internet

  • addiction

  • For young men, addiction related physical changes in the brain are causing lower reactions to porn websites, general drop in libido, ending erectile dysfunction.

  • This process is due to gradual desensitization and the pornography of today is radically different from that of the past.

  • The current rate of youthful ED has never been seen in the past.

  • Symptoms of heavy pornography may include depression, memory impairment, lack of mental focus, and severe social anxiety

  • Teen brains strengthen heavily used circuits and prune back unused ones. By age 22 a male’s sexual taste can be similar to “deep ruts” in his brain


The Good News

  • Ex-Internet Porn Users are providing the missing control group in the great porn experiment

  • Examination of former internet addicts showed that the brain changes were reversing themselves

  • Fortunately, the brain can revert back to more healthy behavior as the user abandons pornography


Gary Wilson is former anatomy and physiology teacher and an expert in the neurochemistry of addiction, mating, and bonding. His research is compelling, and in our opinion this talk is a must watch. Additionally, the yourbrainonporn.com website is an excellent resource for more education in the research of the pornography/brain connection.

4012 River Road  |  Suite 5B

St. George, Utah  84790

Office: 435.674.1904

Volume Sales: 435.708.1938

  • Facebook
  • Instagram

For Speaking Engagements

Call 435.674.1904

or Email: info@freein13.com

Subscribe to Updates

Freein13 values confidentiality and does not collect your personal information. This prevents sharing, selling, or using your information for research.

©2019 by Freein13