Several years ago (I was in my 20s) I was driving through Tennessee and needed to make a pit stop. The next opportunity to stop was a 'parking area,' kind of like a rest area except there were no buildings. To relieve yourself, you had to walk a little ways back into the woods. They had sections of the woods marked for 'men' and 'women.'
I found a spot in the 'men's' section, unzipped and began to empty myself of the coffee I'd consumed on the road. The temperature was perfect, and the fresh air felt great on my dick. It started to get hard, and I responded by fondling it.
I unbuckled my jeans to get a more free feeling. By now I'm fully erect and stroking up and down, oblivious to everything else but the wonderful feeling building up inside my hard dick.
When I finally couldn't hold it in anymore, my stiff cock erupted in an explosive orgasm. It felt like I was shooting streams of cum five feet or more.
Like I said, I was oblivious to my surroundings until after my bliss had subsided. Then I realized that a lot of other guys were in the woods taking care of business, and some of them had been watching. I looked around and smiled as I wiped the last drops of cum off the tip of my dick. Some of the other guys were disgusted, others were amused. I only hope that at least some of them found the same blissful relief that I did at that most memorable rest stop!