Sex is one thing,
Watching porn is another,
And masturbation is in general, the third.
All these things can exist both separately and together.
I watch porn (and almost always only soft and solo) because that it brings me aesthetic pleasure to “feed my eyes.” And I don’t watch it often - once or twice a week, and I don’t always masturbate to it, 50/50.
When I have sex with my beloved, I think only about her and myself. This is our contact and why should I keep someone else in my head?
You are developing a stereotype that everyone here is a character who has fallen to the bottom of instincts, who has no morals, no taste, no taste for life principles.
You shouldn’t paint everyone with the same brush, even though sometimes you want to do it.