I think this is POTENTIALLY problematic. It is problematic if, as numerous people have stated, the rape porn etc. is not consensual. I just figured the rape, snuff etc. was not real, but roleplaying. If it IS real, it is problematic. I mean, I can still understand where he's getting from (I have some pretty extreme fantasies myself, which I have never told anyone about and possibly never will) - some people just get turned on by the thought of extreme domination and submission, or control. But there is a difference by getting turned on, sort of, by the fantasy of it and watching movies where crimes are committed to real people. I mean, a lot of people - men and women - have fantasies of rape and extreme control, but most of them would get disgusted and horrified by real rape (there is also a small minority of people with these fantasies who would get aroused, but they would still intellectually understand how wrong it was). Most women who fantasize about rape don't actually want to get raped. It is an awful, life-shattering crime which steals your self-esteem and self-worth, your safety and your bodily autonomy. But a lot of these women would still fantasize about it, because a fantasy is always a product of your mind and can't actually hurt you. I am guessing it is the same with men who fantasize about raping someone, it is the fantasy of the control aspect that appeals to them, actually raping them is a mile away from fantasizing about it. The same with people who fantasize about having sex with children or minors: It's often the taboo/innocence aspect of it that turns them on, and most of them would feel sick and angry about people doing these things to children in the real world. To people who don't have these fantasies, this can be impossible to understand. It is still important, though: Having violent or "illegal" fantasies does not mean these people want to be violent, outside of potential safe role-playing environment. There is a reason trust is a codeword in BDSM, for instance, those establishments, clubs etc. don't tolerate people who even threaten to break the established rules for it.

The animal killing is bad, sure, but it's not all as bad as REAL snuff films, if that's what he's watching (which I have problems with believing, that he could do for 20 years without being caught for). I understand his reasoning, his problems seem to stem from a difficulty to separate his fantasies from reality, in the way that he doesn't want to - or care to - understand that the people and animals in those movies are real, living things. In this way, I believe he needs help. He sounds like an addict either way, and one of the sympthoms of porn addiction is that you constantly need rougher and rougher movies to satisfy your lust. Some research suggests this can lead to less empathy (as it can mean you get desensitized to these issues in real life) for some, as they stop caring about the actors in the movies being real. IOW, not being able to distinguish between fantasy or reality - or, because their addiction escalates, it's not enough to watch "make believe" movies anymore, it's not a turn on when you know they're just acting. If he is at this level of addiction - which it kind of sounds like - he needs help. Because that means he is heading down a very, very dark path. It all depends on whether the movies are consensual and whether or not he has any desire to see this happening in real life/without it being an act. That is what you need to figure out.

The good news, is that - even if he will never stop having these desires - there are alternatives. First of all, consensual movies with these extreme themes (which I hope is what he's watching anyways). Second of all, sex stories. Yes, I am serious. It's not as graphic, but it does the trick (and can go MUCH further than the movies, because it's a story and not a movie with actual people acting). I am sure that regardless of the level of extremity to his fantasies, he will find some that please. I know of some places he can look, I am not sure you are allowed to post names etc. of other webpages here, but you can message me about it.