My first question, advice is very welcome! Paraphilia y/n?

Hello,
I stumbled over this site today, after pondering issues which I will describe in the following.
First to describe me: I am a 22 year old male, and have been in a loving relationship with my girlfriend for the past three years. I would describe my affections for women as normally heterosexual, meaning that I find a lot of women attractive, have had crushes on and have fallen in love with a fair share of girls over the past years, and have no sexual problems in my realtionship. That is to say, woman turn me on.
Nevertheless, over the past 4-5 years I have observed a tendency to be interested in a wide variety of, for me, strange things, such as certain gay or shemale pornography, videos depicting playacted rape scenes, incest stories and movies, and certain bestiality scenes. Back in puberty I was freaked out by discovering that gay pornography turned me on, agitated and confused. I did not understand this interest because of the fact of mostly enjoying straight and lesbian porn, and being interested in specific girls at the time. I wondered if I might be bisexual, and if so what that would mean in general.
Now, some years later, I realize that of course as a pubescent boy sexual confusion is run of the mill. However, with passing time I also realized that watching incest films, and rape movies got me excited. I used to masturbate to these films but was left with a weird feeling afterwards. After discovering bestiality movies aswell, I found that while the thought of actually participating in such acts discusted me completely, watching these films contributed to my sexual arousal.
With all these incidents, gay porn, incest, rape, and bestiality, it would start of by being sexualy aroused and starting to watch porn (lesbian, guy & girl) and then, getting bored by the performances on screen looking for something harder, and watching the above mentioned variety of movies.

An important information at this point I belive would be, that this fascination with strange sexual acts is not in any way part of my normal day to day life. Neither do I fantasise about any of the mentione topics during sex, (which is for the most part loving and tender), nor do any of them cross my mind during the regular acts of masturbation, which normally vary from lesbian and guy on girl sex to gang bangs and perhaps slight female dominance.
Its just as if my interest in the above mentioned topics only turns itself on occasionally, perhaps 5-10 times a year (overstated) and then shuts itself of again. Also I do not try to supress these experiences, or force myself to conduct in "normal" sexual activity. Its just like I said, now and then I just seem to be bored by watching regular porn, and start searching for weirder, crasser pornography.
Googling the subject today, I stumbled over the term "Paraphilia" on this website, and thought that it may be related to the condition mentioned above. Although I am not sure, because with me its not a sexual obsession, but more like passing flashes of interest into strange, "forbidden" forms of sexuality.
My thought is, that for some reason I am occasionally turned on by seeing crass, out of the ordinary, weird stuff, and that my boredom with conventional porn has driven me from gay porn, to incest porn, to rape porn, to bestiality porn, always searching for something harder, stranger.

Wow, that was a lot of text, and if you have read this far, I thank you for taking the time! I would greatly appreciate other oppinions on this matter, for I am at a loss of what to make of it.
Thank you for your answers,
have a nice day!

Everyone gets bored of seeing the same stuff over and over again. Pretty ordinary.

pushing the envelope is not okay.

just my opinion.

you know every serial killer rapist will tell you the same thing
what made them that way was pornography.

so stop it.

For once, I'm in agreement with Tabs.

The way it works is that regular use of porn desensitises the viewer, causing them to require progressively more extreme imagery. For some personality types it becomes an addiction, just like a drug, causing the user to seek increasingly extreme stimulus to get their fix.

Needless to say, it can be a very dangerous downward spiral.

Graveyard76 wrote:For once, I'm in agreement with Tabs.

The way it works is that regular use of porn desensitises the viewer, causing them to require progressively more extreme imagery. For some personality types it becomes an addiction, just like a drug, causing the user to seek increasingly extreme stimulus to get their fix.

Needless to say, it can be a very dangerous downward spiral.

I am in total agreement here, it is a very dangerous downward spiral and I am learning the hard way.

Because this only happens 5-10 times a year, I'd say you have a pretty good chance of stopping it completely. As you said you don't try to supress it, maybe if you did, it would work, you never know!

Thank you for all the replies,
feel free to leave more.