Like almost every other 20 year old male in my beloved country, I was serving in the military. And specifically in that weekend, I was on guard-duty in some shitty outpost, with 2 other guys.
Spoiler alert - we didn't have a gay gang bang (although in hindsight that might have been awesome).
So me and one of the two were talking about sex, and in a manner which was very much unlike me we were sharing stories.
At some point, we decided that if we already have 8 (or 16, depending on the rotation) hours of dead time, we might as well enjoy the sun and get some tan.
Further down the road, roughly 10 minutes in the sun, we thought why not turn it into naked sun bathing.
Less then 5 minutes afterwards, not sure which one of us, brought up the subject of being with another man. I must say, whether it was I or him, my cock was fully aroused and it was a mad boner, which was weird because I never found myself attracted to men, not even by little.
As I said, I had a girlfriend back then, and in that particular moment I chose to be loyal. Not long after we got dressed and went back to our quarters, and I went to take a shower.
During that shower however, all I thought was how much I wanted him to sneak behind me and fuck the hell out of me. I went out side, still a bit soaky, naked as hell, and said "let's do it".
The room was more than spartan, with a two story bunk bed (extremely low and narrow) and I think that's it. He was fully dressed, and asked me in reply "are you sure?", which was fair after I just moments ago chickened out of it.
Before I knew it, I was on my knees sucking his dick like there's no tomorrow...