I voted 10-15, but I don't really remember. I know I was too young to ejaculate, and it actually started by accident in the shower. Then somehow I discovered that I didn't need the shower, and my fingers worked just fine. The first time I DID ejaculate, I thought I had injured myself.
Then I found out that my dick wouldn't fall off, and I still REALLY wanted to do that again, and life was good.