OP, do you think fapping without looking at porn makes it any better?
I mean what do u think is worse: the process of fapping itself or the fact that you're fapping over 2 random people faking a love scene?
I can only relate my own experience but I couldn't get as hard, or stay hard if I tried to fap without porn. I think masturbation itself is not so bad, provided that you have a real person in your thoughts when you are choking the chicken. Having said that, as soon as I knew that pulling on my knob gave me a high, I was doing it all the time, so I was probably addicted to just masturbation too.
In terms of relating it to the theory that it desensitizes your brain's reward circuitry, I would say that masturbation on its own is not even in the same league as masturbating to modern-day porn.