Some people find ways to work themselves out of the hardships in life by justifying their behavior. They get so delusional, they really start believing what they say.
The problem with porn/sex addiction, is how do you differentiate a man that watched so much porn he had to escalate into illegal/immoral territory from a man who has a legit psycho-sexual disorder? At what point does it go from a simple porn addiction to actively doing illegal things? Did the disorder come first, or did the addiction cause it?
The questions are building; revelations; you are being redeemed, finally.