I watched mybrainonporn videos and yes there's plenty of information there. It mentions something called AROUSAL ADDICTION. What are your thoughts on this?

That's the affect of porn on the brain according to that. Everytime you look at porn, whether it's hardcore or softcore ( and btw I only look at softcore material) you are getting hits of dopamine in the brain over and over. And the brain cannot deal with this which leads to over-stimulation over time. It's similar to other addictions, say to drugs, alcohol etc.