Interesting, I’d never given this much thought. I’m of the age that my guidance was what she wanted/required, a whole lot of foreplay. As you wrote, porn seems to have nothing to do with what she wants.
Another aspect of porn that you didn’t mention was that it’s dominant feature is a close-up of a penis, an ejaculating one. That seems like it might be something that male homosexuals would like, but it’s in heterosexual porn with a male target audience. I wonder how that affects sexual views of young men with that as a learning model.