I discovered masturbation at a very late age. I was raised extremely conservative Christian. My parents never had "the talk" with me, so I learned only bits and pieces of information. By the time I was 14 (1996), I had read the entire 1964 World Book section on reproduction and sex. The whole reason I ever even tried masturbation was because guys at school would refer to it as if those who did it were weird or wrong. Guys always made fun of it, and I wondered what it was supposed to be exactly.
I was about 12 years old when a school friend introduced me to masturbation. When I was at his house for a visit, he showed me his penis, and he had an erection. I had never seen an erect penis before, but suddenly also my penis became erect. I don't remember that I ever had an erection at all before then. He showed me what you can do with your penis, and he told me that when I stroke my penis a white liquid will come out, which would be that stuff children are made with, and it will feel great.
I learned how to masturbate at age 11, during the summer of 1990 (I am currently 23). The interesting thing about my discovery is that at that same time, I was also discovering that I was "different." Years later would realize "different" meant I was gay.
As a young boy I was always interested in things sexual. There was nothing said about sexual things in my household, as both my parents were rather Victorian in their beliefs and attitudes concerning sex. Most of my cousins with which I had contact were girls and were equally interested in my equipment. We often played "doctor" and "I'll show you mine if you show me yours." I remember their handling my penis and scrotum and sometimes even touching my anus at times. This was exciting and pleasurable. I in turn felt them and inserted my fingers into their small vaginal passages.