Dear fellow Peter,
Your article is pure "goupi" a Mandarin word you can google. You cite some references and when I check them they are connected to anti-porn sites with an obvious agenda. (Hello, Ms. Dworkin) There is no proof in the medical literature that I am aware of that carefully documents brain damage from porn and the pleasure center activated by it. If that were so, then actual sex and eating, which stimulate the pleasure center would damage our brain. Doe not happen. And there is no "tail" nucleus - I suspect you are writing of the tail of the Caudate Nucleus, deep in the brain.
You are free to not watch porn. You should not peddle undocumented falsehoods or unproven assertions. Porn and sex-work are as ancient as humankind. To paraphrase what the GOP stupidly says about "rape", just lie back and let others enjoy it.