there are.... there are many actually. And many hentai of that too, not just yaoi. :D
IRL? it's no shop but there's something like that happening everywhere even w/o money involved.
Yeah, irl.... I watch porn so I see many of shops like that... And the red light district is such a magical place...
if i'm not wrong I've seen straight porn where there was this gameshow which some women put their asses through a wall and got fucked by their dads or brothers or something and they had to guess which one of the women they fucked was their relatives (yeah it was very fucked up) (it was very traumatising and scarring for me seeing how i was just a kid back then(￣∇￣") ) Are there really those kinds of shops but with men in the walls instead?
are there really sex shops like that hole in the wall?