I have been an intermittent porn watcher, more when single than married, and I have never bought any. I would masturbate to a series of short clips until I found one that I really liked and finish tothat. I discovered hentai and noticed after a while that even regular porn didn’t really do it for me. I later added pocket pussies (some of them are exquisite and feel better than some actual vaginas I’ve been in.) The end result of all this intermittent porn / hentai use, frequent masturbation by hand and toys was that I found myself losing interest in having sex with my wife. (She didn’t know I would fap to this stuff in the bathroom or into the toys when she was gone.) There is no vagina that will be as tight as your own hand, and I found I wasn’t enjoying the feel of her vagina as much anymore. I also noticed that I would lose some of my erection during intercourse, I wouldn’t go completely soft but it would not be as hard as usual throughout to ejaculation. I am an older man (52) and had low testosterone too so that may have had something to do with it also. At any rate, when I stopped watching porn and cut back on the masturbation I began to enjoy sex again, got turned on just by my wife and her vagina felt tight enough again that I would not lose any of my erection.
So long story short, I no longer watch porn or use pocket pussies, and rarely masturbate anymore.