Once again, I wrote too too much and decided to erase it. Just a few ideas:
1. Lesbian porn (both West and JAV) has been and probably always will be made for straight male slightly homophobic fans.
2. more women are buying porn now, which is definitely affecting how porn is made, but I'm not sure exactly how and how much.
3. data from the DMM survey actually said that one of the top search term by women customer is for r*** and molestation porn, I still have difficulty wrapping my head around it.
4. Japanese population (including the non-porn-buying) are dating less, marrying less, divorcing more, fucking less, having fewer babies. Actually Americans and most so-called advanced economies are about the same. (See this vid:
Why young people are having less sex? )
Altogether porn sex will be less and less realistic because more and more customers have never seen nor touched a fully naked person of opposite sex. They hardly even know how opposite sex talk and think in real world because they only know them in anime, manga, games and TV drama.
As for female orgasm (in the real world) my current theory is that, except for young boy-men, orgasm is hugely subjective. If someone wants it and believe s/he will or must have it, s/he will have it. So men can (almost) always get orgasm because he wants it and won't quit until he gets it. Many women don't have orgasm because she doesn't believe she will get it or give up and blame it on the dude.
Take a slightly weird example: sometimes I am fucking a particularly tight asshole that I can't ejaculate. So I might have this "broken-up" orgasm that psychologically I might had an orgasm but physically I still have a sack full of semen. So after the sex is "done", (maybe after a short nap) I sneak off to masturbate until I get that delayed satisfaction. My cock might get very sore when I make myself erect again, but here's the psych part, I am determined to unload my semen no matter how tired I might be or how sore my dick feels. If I can't get my satisfaction or not a full one, I take matter into my own hand. A woman tend to relish in her dissatisfaction.