I learned about masturbating at about the age of 7 with my uncle Bill who was 15 at the time. My parents and I used to visit my Grandparents almost every Sunday.
One evening my uncle was showing me a baking soda powered submarine in the bathroom sink. After about 15 minutes he closed and locked the door and said he wanted to show me something. He told me to sit on the edge of the bathtub near the commode. Then he dropped his jeans and underwear and sat on the commode. That was the first I ever saw real dick. It was all hard, about 6 inches long and sticking straight up and he had a lot of hair around it. He started stroking his dick while I looked on. Then he told me to put my hand on his dick and do what he had been doing. I didn't want to but he told me that if I did it for him he would do it to me, then he took my hand and put it on his dick. I wrapped my little fingers around it and started moving my hand up and down. He leaned back against the toilet tank while I stroked his dick for him. This went on for a few minutes when he moved my hand and started stroking his dick himself. He got a piece of toilet paper and told me 'watch this'. He put the paper under the head of his dick and I watched as this thick white stuff came out of the pee hole. I was amazed at seeing this. He held the paper up and told me it was called cream and I'd be able to do it in a few years.
Our bathroom sessions went on for about another year, until he started driving. He never did play with my dick. But I've masturbated many times over the years thinking about all the times I stroked my uncle off. Sometimes I wish he had asked me to suck his dick.