The direction this thread has taken, I feel like Poem's concern is less about the proliferation of rape culture, and more about the misbehavior of PornHub.
There is an intersection, I think, although it's merely been implied mostly - that the availability and widespread proliferation of "rapey" videos - simulated or not - leads to "rapey" behaviors. Yes yes, I'm familiar with the already cited mantra that "everyone knows the difference between fantasy and reality"; but if we push past that thought-stopping cliche, I think there's at least some merit to the concern.
In most areas, people readily concede that media messaging has an effect on human behavior. Few people dispute, for instance, that a steady unchallenged diet of Fox News and ONN has an effect on the thoughts, attitudes, and behaviors of the people who consume it. Few dispute that an algorithmically-generated progression of ever-slightly-more extreme content by way of Facebook and YouTube constitutes a "radicalization pipeline" that will turn a relatively even-keeled and nonjudgmental individual into a hardcore extremist who believes committing crimes is justified in order to save the white race from extinction at the hands of blacks and Jews. But when it comes to porn and video games suddenly a lot of people refuse to make that concession. Those things are media, they are extremely popular and contain tropes and messaging just like all visual media, but we want to obstinately refuse that they can have any effect on the people who consume them in the same ways that we readily recognize other visual media can.
That reticence is, for the most part, reflexive - it's because forty years ago those mediums were challenged by religious zealots who attacked them as immoral and tried to ban them from existence altogether. They claimed censorship was necessary because the content was "damaging" consumers by turning them into liberals, or making them think unmarried sex is okay.
But there could be a pendulum-swinging-too-far component of that knee-jerk defensiveness, where we went from just rejecting the religious zealots' definition of "damage" all the way to insisting as a just-so proposition that people can't be influenced by those types of media in any way at all.
Relevant anecdote, which I freely admit is an anecdote: over the last year or so, I've happened to run across consistent stories by women in a few different contexts that some male partner unexpectedly started grabbing and holding them by the throat during sex - and not only that, but that the male partner seemed surprised and upset when the woman objected to this. One particular woman complained that after her partner promised never to do that again, he did anyway the next time they got intimate, and that was where the relationship ended.
These anecdotes gybe in a way with my own experience - I lost my appetite for porn a few years ago for a couple of reasons but this by far was the largest one - it just started happening, a lot, that in the middle of a video the male actor would suddenly firmly grab his female partner by the throat. Once in a while it would even be obvious that he was squeezing hard enough for her face to turn red or for her to start making gagging noises. It was extremely offputting to me. It wasn't EVERY video, but it was an uncomfortable lot of them, and it was also completely unavoidable because these instances would appear out of nowhere in thoroughly mainstream videos; videos without particularly edgy or quasi-violent titles, or anything else to suggest that I should be expecting something that I'd normally think of as niche S&M content to pop up in the middle of them. So eventually I just stopped watching altogether.
Does there
have to be a connection between the mainstreaming of "choking during sex" on sites like PornHub, and women being unexpectedly throttled by their partners more and more lately? No, I suppose there isn't necessarily a correlation. But
could there be? Yes, is absolutely possible. If the content was being made to cater to the niche, it would be labeled somehow so that people specifically searching for it could find it. Instead it started appearing unannounced in mainstream content, and then it started appearing unannounced in real life situations.