How did you find out how to masturbate?

[Alterego-X]

I was like 6 or 7 years old, years before I could ejaculate.

It took me like 6-7 other years to learn that the thing I do is the same thing as this so called "masturbation", so I didn't invent it as I imagined.

For some years, I was also worried that it will make my penis grow smaller than average.