Like, who thought up glory holes.. I mean, seriously. I imagine it went one of two ways. 1) Someone went into a bathroom of a gas station or dive bar and sees a hole in the wall. This dude think to himself "IMA STICK MY DICK IN THERE"... so he does, and on the other side, just happens to be a welcoming mouth, asshole, vagina, hand, whatever. (or on the flipside, I woman/man goes into a bathroom and hops on the dick already sticking through said hole) 2) Its planned. A man says to their partner "hey lets cut a hole in this wall and you go on the other side and we'll fuck through the hole" I like to imagine it was scenario 1 because HOW FUCKING AMPED WOULD YOU BE TO STICK YOUR DICK IN A HOLE AND GET SUCKED OFF/FUCKED. Putting your dick through an unkown hole is pretty fucking risky, after all. Either way, its fucking bizarre when you really think about it. Please dont ask why I have invested so much time into this, because I dont even know myself. Its been a weird day.