of course it is addicting just like anything else. if you watch porn all the time instead of banging your wife then you have issues and it can ruin a marriage. a buddy of mine had that problem. he would watch bimbo's in porn and would go to strip clubs and that sort of thing. he ended up inviting a buddy of his for the week and she finally got attention from a man, and ended up running away with that guy.
he had an unrealistic expectation of women and it screwed up his marriage, he is in the middle of a divorce now. obviously there are a million reasons to get divorced but that is a big one when you neglect your spouse and make her feel like she isn't good enough. I can't say I blame her one bit for leaving.
and unfortunately he didn't learn his lesson.. went back to vegas, more sluts and strippers, and he uses tinder to bang 18/19 year olds. i told him that he is an idiot but that is the lifestyle he has chosen and it will cost him in divorce court