Just yesterday, I had a great hand job from a guy in the steam room in at the gym. Totally wasn't expecting it. I noticed him earlier in the locker room, and he followed me in the steam. I sat on the first bench, and he sat on the higher bench behind me. Eventually, when it was just the 2 of us left in there, he said, "I need to see what is under there," and reached over me to expose my dick. Although I was kind of startled, I didn't say anything. He stroked me hard and good. Soon, another guy came in, and he stopped, but once he recognized him as a friend, he continued to stroke me off from behind.
I think that fact that it was so random, and that this other guy was watching, totally turned me on, and I shot a load all over the place. Awesome experience!!!