I was 13. I'd been hearing older kids talk about jerking off, and wanted to try it. I was alone one afternoon, and started stroking my cock on the living room couch. Wasn't really sure how to do it, but I kept trying and it felt good. I came and shot some clear cum fluid. Not a lot, but I was pretty amazed. Didn't know how good it could feel. Did it again right away, I think!