I want to say it was my bush but I don't distinctly remember. Today, I consider myself moderately hairy (chest etc.) But I was fixated on pubes when I was a kid, especially armpits. Actually, I love a guy's pits to this day and mine aren't particularly hairy. At the time, I thought I was a late bloomer and I'd never hit puberty. In retrospect, I probably wasn't especially late but a few guys of certain ethnicities (Italian, Greek, etc.) just naturally were hairy early. I used to gauge who was able to shoot by how hairy their legs/pits were.
I remember as a freshman in HS, there was a kid in my class who had a full beard (facial hair wasn't allowed but it was obvious he shaved his face.) I didn't shave until 18 so I was jealous as hell.