What a surprise
One morning very early I was walking in the park when I had to go to the toilet. The public toilets were in the middle of the park and when I entered, there was a young man in there about 25-30, he jumped up from the seat, there was no doors on the cubicals, and faced in the toilet. You did not have to be a rocket scientist to figure out what he was doing, he just did not hear me coming.
I was relieving myself, when I said over the wall, 'don't worry about it, you can just continue what you were doing.' He said, 'what.' I said 'you can continue pulling youself off, I don't mind, if you like I would like to watch you.' He said nothing but I heard him sit down on the toilet, I then heard some rustling and then the familiar slap slap noise. I finished what I was doing and by now my dick had grown hard in my hand.
I zipped up and looked around the wall at the stranger on the toilet, he had completely removed all his clothes and was beating away with a very slow motion, obviously he was not in a hurry to come and was putting on a show for me. I had never seen an erect donkey dick, but this guy must have come close, he was massive. I just stood their and took in the view, he was having a ball, he started to get faster and faster, I watched for about 10 minutes and he was still going, I could not take it anymore.
I dropped my pants and then started to wank him off, he had the biggest dick I had ever grabbed hold of. He returned the favor and started to pull me off. I came in about 10 strokes, he grabbed my spunk and used it as lube, he finished himself off in very short time. I pulled my pants up and left, that was a great morning.