Recalling my earliest encounter with another guy.
I am predominantly straight, but had a few encounters with guys when I was in my teens, but also had one more recently (see link)! First time was when I ran into a buddy of mine who was a year or two older than me, on the street, during Summer break. We hadn't seen each other in a couple of weeks, we did some small talk when he told me about his brother's porn cache that we should check out and that his folks were out for the day. We got to his place, he came back into the kitchen with a briefcase, that was the cache! We started leafing through the mags; they were mostly nudist magazines, but they were about the most explicit stuff you could find in Canada at the time. After a few minutes, my buddy suggested we should compare cock sizes. He went to another room with a ruler, and called out his size (about 6'). He came back, and asked me whether I was ready to measure mine. I was not fully hard, but I said I would go measure it. I went to the other room, whipped it out, but it was just half hard. I squeezed and played with my cock some, then it got quite hard. I called out my size (6' too). He then came into the same room, while I still had my hard cock in my hand, and suggested we compare them side by side. Which we did, facing one another, after pulling our trousers down to our ankles to remove any obstacle that would invalidate our comparison. Both our cocks were about the same length, and both uncut. His had a bit more girth than mine, and was darker. We then started rubbing our cocks against each other, and then we decided to do some fencing, using our cocks as swords! He then hit my cockhead with his, it hurt a bit, so I decided to squeeze both our cocks together, to kind of get back at him. It hurt him a bit (or so he said), and then he started grabbing at my balls, which he gently squeezed and pulled. His hand was holding me by my balls, and I decided to give up, offering that we start doing nicer stuff that would not hurt. We then decided jerking each other off would be nicer and friendlier. We started, but only after checking each other out thoroughly and comparing to see who had more pubic hair, who had the hairiest asshole, the darkest cock and sack. We sat on the bed, side by side, holding each other's cock. It was awesome to be there holding a hard cock so much like mine, but slightly bigger, with a purplish head, and to feel its warmth in my hand. It did not take long for my buddy to start shooting off all over himself. Unfortunately, he was then no longer interested in playing with my cock, and I had to finish myself off, but I was still all hot and excited by the fact I had just played with another cock for the first time, and I had made it shoot off. I continued stroking, then went to the bathroom to shoot off into the sink. After I was finished, I had to leave. We never had an encore, unfortunately. But it gave me some inspiration to try and convince another buddy of mine that two guys could have fun together too. To this day, I still think about his magnificent cock when jerking.