First time gloryhole

I guess I was about 19 or 20. There were a few adult bookstores near where I lived, but normally I was terrified of going in. If I got my nerve up, I'd maybe go in and buy porn. I was a horny young fucker, and I suppose I was at least bi, even though at the time I couldn't quite deal with it.
A few times I snuck in there during the day, and eventually got the gist of what the booths were about, well, officially anyway. I didn't know about gloryholes but I frequently noticed holes in the walls of some booths. It freaked me out a little because I was afraid someone would see me jacking off in there, as if.
One time I was in one of these booths, a guy stuck his finger through the hole. I didn't quite get what it meant, so I actually put my own finger in the hole after his to see what he would do. Deep down I must've known what it was about, because my finger kind of caressed his while they switched places. He stuck his cock through the hole. It was a beautiful long white cock with a nice head. Now I knew exactly what to do. I stroked it a couple times, and then engulfed it with my lips. I heard him moan through the thin walls, and he came in my mouth right away. I entertained the idea that he came so fast because I was good at cocksucking, but I'm pretty sure he was just a one pump chump. It was a great first experience, but it wasn't over yet.
He pulled his cock back, and I suppose zipped up, and left right away. Now I'm all horned up and want more. The door next to mine opened and closed, and right away a finger poked through the hole. It was dark. I know, I'm not trying to be a racist, but I was a little hesitant, I had barely had any dick, and now a black guy...Well I tried to take control of the situation and immediately pushed my cock into the hole. Either my small cock wasn't sticking out far enough, or this dude wasn't trying that hard, because he just half assed stroked my head. When this wasn't working for me, I knelt down and pushed my finger in the hole to get his cock. Sure enough, that's what he was waiting for. He shoves this huge veiny black cock through the hole, and right away I start slobbering all over it. I stood up, bent over and tried pushing his huge head in my ass. I kept kneeling back down, wetting it in my mouth and trying to get it in my ass. Soon I heard voices outside saying something about his baloney is in there, or his baloney is in there, and I panicked. I was so scared not only because someone knew we were doing something sketchy, but that I was on the bitch end of it, with a bbc! He pulled out and left hurriedly, while I stayed hiding in my booth. I actually finished jacking off in there, and since there were no more cocks coming throughthe hole, I ate some cum off the corner of the video screen, and then ran out of there as if their short term memory would've failed and they wouldn't know I was the one who just tried to shove a giant black dick in my ass.