Mark, Interesting article, but I would discourage the use of the declaration that pornography and rape are not sex. They are very definitely sexual acts, and to challenge that, would merely a distraction from outset.
And I might add another critique. IMO, the moth analogy distracts from the focus of the subject.
There was no internet when I was growing up, I got my entire sexual education in the schoolyard, and I suspect that I probably would have watched pornography on the internet, if it had been available; sort of like the video version of what we all talked about as kids. :) These days, it is not unusual to find ads with sexual pictures, which I presume are there to take you to some kind of porn site. I have watched a few videos on the internet, but I could not identify with what was going on, nor the people involved. They were not the kind of people with whom I could not imagine having anything whatsoever in common. IMO, the cure for pornography addiction involves just briefly watching it.
Your description of how sexual addiction changes our brain. And it literally does! I did some research on this a couple decades ago, following an incident where a man had been watching a schoolgirl walk past his house every day for two years. He became so obsessed with her that he kidnapped, raped and murdered her, cutting up her body, placing it a suitcase and dumping it in the lake. I was fascinated and mystified by how a person could end up thinking like this. It doesn't happen all at once. It seems that when someone obsesses for something, the brain starts to 'rewire' itself. The total rewiring process takes about three years. So, I presume that unwiring the brain from an addiction must also take three years, notwithstanding I would still love to smoke a cigarette even after many years. :-(
I did not know that dopamine was the happy hormone associated it addictions. I am more familiar with the happy hormone serotonin, a companion of dopamine which is the focus of anti-depressant drugs such as serotonin reuptake inhibitors. I have a lot of widowed folk in my life these days, and the ones that were on serotonin reuptake inhibitors, couldn't wait to get off of them. As a recent widower, upon recommendation, I have found that 5-htp, a serotonin booster, is a great help for the occasional days when I am down, to take the sharp edges off of rough day, or help me sleep.
Best wishes for your address.