A friend of mine and myself learned all about masturbation together.
I first learned about masturbation when I was about nine, and my sister had a book about the odds and ends of sex and masturbation that my parents had given her. I started by hitting my penis repeatedly, and once I began to come, I started to jack off.
I used to spend the night at one of my friends' houses. Tim was the same age as me, eleven at the time, and we were both curious about masturbation and sex, etc. We had been watching a movie with his older brother, and the word blowjob was used. We asked him what that was, and when he told us, we were intrigued. Later that night, when he went to bed and we were left alone in the basement, we began to talk. I told Tim I knew of a way to touch our penises that felt good. He was probably about five inches cut, and I was about the same, but uncut.
I spat on his penis and started to stroke it. We were both naked, and as he lay on the floor with me straddling his thighs, he began to raise and lower his ass off the floor. I jacked him off until he could no longer take it, and finally, I stopped and laid against his chest. He kissed me, and then we traded positions, and he jacked me off. He was especially intrigued by my foreskin, and was envious of it and the pleasure it provided me while masturbating.
We continued this, inviting other friends to join. However, Tim and I continued throughout high school, and when we get the chance to visit one another at our colleges or have breaks at home together, we always get together for a mutual and usually much much more.