I agree and this is why I don't care at all if sex in fanfic and porn is "unrealistic".

It's fiction and a fantasy, and only the completely naive assume this is how it works in reality. And, only the pretentious and willfully judgey assume that every creator writes or draws fantasy sex because "they just don't know better".

You want traces of poop in your anal? Go for it, but expecting it to be everyone's preference or attempting to educate people about "realistic sex" as if they aren't aware is naive at best.