I'm actually intending to write a post about how the "realism" of some taboo doesn't matter in porn, only the "real"*, but I never get around to it, because there is too much nonsense to deal with.

* In a nutshell, by arguing about "realism this or realism that", it shifts attention towards arbitrary boundaries of realism, and discourse along those lines, rather than actual ethics. That is what makes it garbage. There is more to it though.