JAV Porn – I need clarification – NHDTC-107

Ok, i have a bunch of questions about this film and japanese porn in general that i would like to get answered:

1- First off, let's start with an easy one: why are 10+ years veteran actors getting their face blurred?

2- Why do they tag with "#anal" movies where they barely get a glance at a woman sphincter, and in this one, where they're literally getting impaled through their butts, they don't?

3- Why the fuck there's ALWAYS gotta be SHIT when anal is involved?? Is this something that only I don't understand? Is it a cultural barrier? Do they lack the water infrastructure to properly wash their asses?? Do they actually think that every person that's into anal is automatically into SCAT as well???

Please clarify. Thank you 🙏🏻