Maybe my reply is only relevant to the general public and not people with a conditioned penis or very healthy erection quality?
When you fuck around with your own dick or watch porn you become desensitized to real women and your brain becomes trained to erotisize masturbation and porn. The ways in which this fucks up your life are uncountable.
When I was a kid I actually remember having wet dreams about WATCHING porn instead of fucking real women, lol. This has more to do with game theory and relationships than P/E though, i'm not an expert on p/e.
Google your brain on porn. Masturbating to a fantasy in your mind is just as bad. Had a very good link to give summing it up, can't fuckin find it with google anymore ) =
Even if you're able to have quality erections with real women after porn/masturbation, I still have concerns with it that I could elaborate on/ dig up evidence if anyone's interested.
For me, the reason I don't fuck around with my dick anymore is because I want to be able to get horny by looking at real women I see during the day, on dates, in bars, exc. I need something to motivate me to approach women. Also through the law of state transference, being horny on a date will make your date/gf/wife horny as well. The post I was going to link explained how it can porn/fapping de-sexualizes marriage. Do you think a wife wants to be duty fucked, or does she want a husband to be authentically aroused by her, and very much so? Ever read 50 shades of grey?
I can get raging hardons looking at very mediocre girls now. When I get horny, I think about fucking a GF or going to a bar/club and trying to find a new girl to fuck instead of watching porn. Masturbation is no longer a part of my life. Maybe a good thing, maybe not lol cuz i've slept with a few suspect girls.... 3+ months no fapping/porn for me.