I was just watching this on youtube:
This would certainly explain why my ex husband would not connect emotionally to me, why he couldn't get it up unless he was banging one out watching porn and why he had to get involved in fetish and BDSM and ever increasing stimuli to get it up at all. He was in his 30's when he started watching porn and that is when all of the problems started.
Porn does ruin lives. We had a great relationship and sex life before he started getting obsessed with it.