I discovered masturbation at age 15, which I suppose is quite late. My friends in school were increasingly talking about "wanking," and through these conversations (and the hand-actions) I learned what it was all about but had never actually tried it myself. One night I was feeling particularly horny, so gave it a go, using the simple "fist" method that most people start with. It felt better than I had expected. However, when the orgasm came, I didn't know what was happening, and I suddenly realized I was ejaculating and had nothing to catch it in.