NSFW Who has been to a "glory hole" ?

This website and my job are boring today, this should liven it up a bit. Who here has been to a glory hole? Were you on the receiving or the giving end of it? Stories are welcome. What do you think about them, opinions welcome too?

I’ve always wondered if glory holes are really out there. You obviously hear about them in movies, or porn, or tv… but I’m not really the type who frequents porno theaters or what have you where they are supposedly located.

So lets hear it, what’s your take?