Actually one of my earliest memories is of masturbation of a sort. I don't know exactly how old, maybe two or three, and I was rolling on a ball when my mother told me to not do that ever again. Of course I didn't know why she said that because I didn't know what I was doing, just that it felt good.

I did masturbate as a teen, but really didn't know what I was doing then either. It wasn't till much later that I did it in a deliberate way. It's not that I lacked interest. I just wasn't good at it and also have plenty of sexual activity, which seemed better.

Once I bought a toy and learned how to use it things changed. I was able to have very long and multiple orgasms, mostly without much work or need for fantasy. So I considered it a healthy development.