This occured when I was in the seventh grade. I was 13 then. It was my first experience with a boy's ____.
I had a block long walk home from the school bus stop every day back then. Along the way there was this big bush by the sidewalk. On this one day as I walked pass the bush, I spotted this boy standing beside it. I knew he was from our high school. He was standing there with his fly open and his dick sticking out. I'd seen little erections on my younger cousins when I helped give them a bath but had never seen one this big. Once I looked at it the boy quickly put it back in his pants and ran off.
Several day later, he was there again. I was watching for him wondering if he was going to do this again and I saw enough that I knew he was there when I walked past the bush. I looked at him again and this time he had his pants dropped to his knees. I could see everything. His balls, the hair, everything. After I looked at him, he again pulled his pants up and ran off.
The next week as I approached the bush, I could see that he was standing there again. I cleared the bush and looked at him. This time he had his pants down again but he had his hand on his dick and he was stroking it. I'd heard kids talk about this at school and I knew it as jerking off. But, this was the first time that I'd actually seen it. I saw him squirt out this stuff and then quickly pull up his pants and run. I later learned that what this was called was exposing himself. Something I've long since have learned that boys and men love to do but not like this. I didn't see this boy there again and then found out that he had got into trouble for this and was in some kind of program for boys like him. It was a sight to see back then.