Only via netflix.

Only in weird porn videos.

No judgment intended, do you and all, but there is a whole lot of shit in porn that I just do not get the appeal of, glory holes being one of them - if some chick asked me to stick my dick in some hole in the wall, I would just assume she was some kind of witch collecting dicks for a potion or something

No, but I've heard because of covid they're starting to make a comeback (no pun intended).