And here's one of mine:
My husband and I met another gay couple at a dinner party a few years ago. We all instantly connected and over the course of the evening, and many bottles of wine, decided that the 4 of us should go camping sometime, and then actually set plans for 2 weekends later. The next morning, we thought they might not really take it seriously but they texted about what they were planning to bring to cook for dinner, and plans were made.
The day we were supposed to go, we met up and packed everything into 2 cars (we were going 2 different directions after our trip, so it didn't make sense to carpool) and hit the road. On the drive up, my husband and I had the comical discussion about "what if we don't really get along? We've only spent 3ish hours with them. What if it's awkward and we're stuck camping for the next 2 days with them and they're crazy or whatever" But we got to the campsite, had a great afternoon setting up, roaming around, and getting to know each other. We were basically the only people in the campground so it was nice to have the whole place to ourselves.
After dinner, we all sat around the campfire as it got dark and just continued chatting and drinking, all 4 of us in our own camping chairs. It was surprisingly hot outside, despite being night time and so I ended up taking off my shirt and just relaxing in a pair of shorts. There hadn't been any sexual conversations or advances at all, but every now and then I'd catch one of the guys staring in my direction. They were both a few years older than us, but fit, handsome and really enjoyable to be around, so the slight flirting was fun. We had a few more beers and it got late.
After awhile, I started to notice that one of the gents was discreetly trying to hide a bulge in his shorts. He caught me looking and kept trying to hide it, but was also starting to slowly rub it. This got me instantly hard, which I also tried to keep from being noticable. At this point, the chat was still pretty general and I wasn't sure if my husband or the other guy had noticed that two of us were getting turned on. Finally, someone started the discussion around playing around with other couples, and pretty quickly, it was apparent to everyone the all 4 of us were getting visably aroused. A couple of us started rubbing our bulges and then finally one of the guys unzipped his pants, pulled out his cock and started stroking. The conversation basically stopped, and each of us, one by one, took out our dicks and were just enjoying watching each other all stroke by the firelight. This went on for several minutes, and I'm really having to pace because I could shoot at any moment. Then, without a word being spoken, one guy got up, walked over to me, and just blew his load all over my chest, cock and balls. My husband followed after, doing the same thing and then the other guy did as well. I was completely covered in cum. I randomly just said "whoa" to which we all busted up laughing. I high fived all three of them (why not?!) cleaned up and went to bed.
We bonded over that trip and that circle jerk around the fire and have since all become great friends. There have been a few more encounters with them, but none as hot or spontaneous as that first one. It's been a favorite story to tell and memory to stroke to for years!