Ha, either 3 or 4. Yes I was getting there at that age. Mom caught me and told me it was bad for me but I kept doing it anyway, just was worried for a while that it was going to physically make me sick from what my mom said. Was raised in a conservative household so masturbation was a sin. But I was obsessed with it and even did it in school in k and 1st grade. Got into my teens and felt so guilty that I would cut myself afterwards. These days I know it's not wrong so I'm good now.