When I was 11 our neighbors were a nice married couple. He was athletic, tall and muscular and always had short-shorts without underwear while working on an old car in his garage. I would go over to help and would admire his big cock and balls escape from his shorts. His testicles were enormous compared to mine in a long saggy scrotum, his cock was big with blue veins. He would not try to hide his manhood from me, and at times would be erect as I stared at his big size. To this day, I get turned on by the sight of dick and balls escaping from shorts.
Sounds like ur neighbor definitely knew you were looking.. I had older dudes in my circle that did the same.. I love those peek a boo shots too