You know some hippe nutheads, when they go, "Why they ban the porn, but not the violence? The capacity? To dig the prowess?" And the old nutheads go, "Porn is immoral! Not violence! Cuz violence is divine! The act of God!"

This is a ironic situation, and it only mirrors instead of inverse.
How is this possible?
Well, it's easy, porn is actually a violence stimulant as well.
Quite stimulating!
Some people may argue that porn (or something like that of that sort) subdues or invokes passivity.
It really depends on how active and aggressive the activities are.
It still has active motion so it's moving!!!
It also promotes the illusion of idolatry (to worship the actors or something like that) and/or self-idolatry (the porn actors are to entertain, and maybe submit, or worship, you, the audience).

If the factors of influence are warped enough, it can change the matter of perception of the engaged viewer. In usual serial killer cases, police reports say that certain materials may engage the criminal in some mental simulation, before things hit off to the next level of crazy. I'm not going to note examples/details because I don't like to give aspirations for obvious reasons.

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I'm not going to say that porn is absolutely evil. We all have indulges, luxuries, or refinement, to take in. Whether it's a sip of wine, a cigar to smoke, or just to partake into personal development, life, or even existence, is much more bigger than that. When it comes to ratios, it's the matter of (adult) responsibility that must be the counter weight.

I just want to point this out.
Alright, go ahead, flame me, or something like that.