I don't believe I ever didn't masturbate. I guess my first conscious effort was when I was 5. That's the first time I remember knowing what I was doing. I didn't discuss it with anyone until high school, but I already knew that people did it. When I was 12 I injured myself while doing it and then I had to discuss it with a doctor, which was horribly embarassing at the time, but I suppose that it's just funny now. I still do it as often as possible.