I was out today walking my dog, when I seen a guy about 18 walking in front of me, he was wearing shorts.
He kept stopping every few steps to see what looked like from behind, holding or grabbing his cock, while looking around. I stayed well back to see what he was going to do, thinking he may need the loo.
Then he started to walk funny putting his hand down his shorts, he just stopped on the path turning around and walking back my way, pulling his hand out of his shorts as he saw me.
I could clearly see the outline of his hard cock in his shorts, then as we passed, the look on his face, I knew he had to do it, I turned around to see him put both thumbs in his waist band of his shorts, pulling them down, he had a wank, about 9 lines of cum flew out his cock...