Many people say porn is addictive, but the conversation around this sounds quite similar to the conversation around drugs -
https://www.yourbrainonporn.com/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4600144/
which hold that substance and not setting is the main driver of addiction. In the Rat Park experiments the addictive power of morphine was negligible if the rats had a happy social scene instead of a blank cage to live in - see here for clever cartoon on it
https://www.stuartmcmillen.com/comic/rat-park/
http://www.brucekalexander.com/articles-speeches/rat-park
Extrapolating from rats to people, is it possible that porn addiction is less to do with the 'substance' and more to do with the social setting of the user ? (Note: there are critiques of flaws in rat park experiment but I don't know where to find them).