Not sure, but I know it was in middle school. You know about those percussion massagers that are meant for muscle tightness? Well we have 1,but it was blue.
Anyway, I was kinda bored & decided to use that thing on various parts of my body. I wound up going to that "spot", which felt oddly good. So I kept it there. After a few minutes, I get this rush over my body. Never felt it before & didn't even know what it was. All I'd get was the feeling for a while. I don't know how many months after, but I eventually would get cum. It was somewhere around that time when I knew what was happening, & also started watching inappropriate content (not straight porn, b/c gentatalia are gross, but just boobs & butts).
So ye, that's how I found my way into the white, sticky mire.