I wonder if that is entirely accurate. Pornography is graphic images of people or situations designed to stimulate. Do you mean that the concept of DISAPPROVAL of pornography is Victorian, classist, sexist, etc?
However, it still does not explain why people far from Victorian values, from different cultures and more than a hundred years on, still feel uncomfortable about watching porn. I think there is something more and I am trying to find out what.
You started a thread on weather people here "feels uncomfortable about porn in any way" and "I mean generally." Well that's the highest possible level of generality, not having problems in some way with some subgenre of porn, or the production of some specific porn studio but "generally".
And feeling "uncomfortable"- about what? We could engage in a discussion about the way some porn studios treats their young models, but that would probably - at least in parts - be to engage in a much more general discussion on how the entertainment business in general treats people working for them.
But we could also engage in a very different and much more traditional debate on the problematics of explicit sexual imagery in visual porn - it's just that I honestly don't find explicit sexual imagery problematic...
Oh, and by the way - pornography isn't necessarily something pictorial or cinematic. Long, long, long before there were any porn videos or porn photos, there were of course written stories - NIFTY archives is still a pretty popular site on the net, and I dare you to find something as "dirty" in visual medias as Samuel R. Delany's 800+ pages porn novel "Through the Valley of the Nest of Spiders".
No, I wanted to place my discussion on the same level of generality as you had from the beginning, and - in my opinion - the only reasonable way of doing so is to get historical and talk about when, how and why Western societies in the mid-to-late 19th century decided to exclude explicit sexual imagery and explicit sexual literature from respectable culture in general under the labels of "pornography" and "obscene publications".
Of course there's much, much more to say, but maybe this particular post is long enough...