When I was in college and not "getting anything", I would go to Adult Book Stores in downtown Pittsburgh and just watch the porn flicks in the private booths. It was 25 cents for a couple of minutes and you actually fed the machines with tokens. You had to buy $5 worth at the front entrance and then you could get more from the machine in the video booth area. I would usually spend my $5 and then leave. At that time, there were doors with slide locks on the booths, so you had privacy, but I was too worried that I'd somehow get caught, so instead, I'd go back to my room to masturbate while I tried to visualize the scenes I had viewed. I spent a lot of time in my room studying, (studying different ways to get myself off). I have been addicted to masturbation my whole life, so even during periods when I was getting laid regularly, I still couldn't resist the urge to grab my cock and "run one off" every chance I got.
One time when I was in a booth, I had fed the machine a dollar's worth of tokens and was watching some good old-fashioned straight 70s porn, when all of a sudden, out of the corner of my eye, I saw something move. I looked to my left and saw something sticking through the wall. By the light of the video I saw that it was a cock - a black cock, and I heard a slight tapping on the wall. I was startled. As I looked, I noticed that the cock wasn't too big and seemed to be only semi-erect. I was a little uneasy and didn't move. I wasn't going to touch it. The cock remained there for just a few long moments. It never got any harder - and then it disappeared. I looked at the hole, but not too closely. (I didn't want anything to poke me in the eye). It was crudely cut and I saw that it was between adjacent booths. I was surprised at the whole Hole incident and after my movie credits ran out, I left the booth. When I got into the maze of hallways in the viewing booth area, and as I was walking slowly while my eyes were readjusting to the darkness, I saw a number of guys hanging out and reasoned that they weren't there to just watch some quarter movies like me or even for a quick private jack off session. The way they eyed me up, it was obvious that they were on the prowl. I was a young college boy - "fresh meat".
I also saw a young black guy loitering in the hallway that I knew I recognized. It was Marcus, from school; so as not to embarrass either of us, I quickly looked away to avoid making eye contact, and left the Store. I figured that he was there for the same reason that I was, but when I remembered that a black cock had "entered" my booth a few minutes prior, I quickly realized he was there looking for something more. I had never seen a Glory Hole before that, but after my first exposure I knew what it was for.
In that same time period, I had a set up where I would get sucked off regularly by an older male friend, usually in a car in his driveway, but that was a little chancy, since we still ran the risk of discovery by someone in his house. What a great fun time he showed me in my early sexual life, but I was forever horny and the thought of also getting anonymous blow jobs with no strings attached and no danger of any friends or family finding out, was so devilishly exciting, that I started to seek out booths with Glory Holes.
Over the years, for reasons promoted by the "Moral Majority" the local laws changed and the locks on the video booth doors and even the doors themselves started disappearing in most of the Adult Book Stores. I'm actually surprised that the Stores themselves, or at least the video booths, didn't also disappear, but they survived. In that moral climate, of course, most, if not all, Glory Holes also disappeared, so spotting one was a rare find. Any Holes that were still around were probably only there because local law enforcement had been paid off. However, I often saw patched up areas on the walls in some booths and I knew they were remnants of those sinful Glory Holes.
Even though I'm happily married, I've continued to visit Stores throughout my life. The older we get, the less my wife is interested in sex and I'm always on the lookout for a chance to spice up my masturbation sessions. While I'm not attracted to other men, I'm very aware that, unlike most women, we are preoccupied with sex, and so it's much more likely that I'll have an opportunity for a spur-of-the-moment encounter with someone who's also looking to "run one off". To me, an orgasm is an orgasm, whether it's with my wife, alone, with a friend or even a total stranger. And the exhibition aspect of masturbating in front of someone else is also very enticing.
I generally look for a "Buddy Booth". They're the ones where there's a pane of opaque glass between adjacent booths. With the movie running, I can push the "Buddy" button and wait for the guy on the other side to do the same. That clears the glass, (however, not as much as I'd like) so that way we can masturbate "together". I usually want to see who's on the other side and wait for him to pull out his cock before I do; that way I can just watch him if I'm not interested in getting personal. Some guys get a little indignant when I won't unzip and shut off the "Buddy" screen. Then I can usually hear them moving to another booth.
I would come across a Hole on rare occasions, and I learned about the "2 finger rule", so I'd get excited when a guy in the adjacent booth would give me the "signal", but I never had the nerve to even look through the Hole, let alone stick my cock through it. And I'd never had a hard cock in my mouth, so kneeling in front of the Glory Hole was out of the question for me.
In the past year, I've visited a Store that I found. I'm in that area only occasionally. The "buy in" is still $5 - a bargain, except that many times, a lot of the selections aren't even working. Maybe the clerk figures that most guys aren't really watching the movies anyway. The Store is 2 floors and there are video booths on both. Visiting the booths on the 2nd level makes it less likely that you'll be barged in on by law enforcement and "caught with your pants down". And there are locks on the doors so you have all the privacy you need or want.