When I was about 12, a new family moved into the house across the street. There were two kids in the family a boy my age and girl 15.
I soon became friends with Sam, the boy my age in the family which moved into the house across the street. He had a very curvy sister of 15 who got me hard just looking at her. Sam soon discovered that I had the same relationship to my pecker that he had. He wasn't so crude as to ask if I jerked off; he sort of got around to the subject sideways. It began when he asked if there weren't some place where we could swim without being bothered with a lot of company. There was. It was a little lake in the woods about 3 miles away which we could easily ride our bikes to. We planned to go there next Saturday. When we did, we had the lake to ourselves, so Sam suggested we skinny dip. I agreed, and each of us saw the other for the first time naked. Sam's equipment looked very much like my own; circumcised, a patch of hair above his pecker, about 2.5 inches soft. I noticed him staring at my pecker, but didn't think more of it then. A week later he proposed that we build a tree house in the tree in his yard, if his parents let us. I agreed; they agreed, and we soon had our tree house. about the second time we were in the tree house, he proposed a game of truth or dare. After a long series of questions, Sam asked if I jerked off. I admitted I did. He dared me to take my pecker out. I did; and dared him to do the same. He did. Then he said, 'Let's jerk off.' We both began jerking, and had good orgasms. This was the beginning of our jerking sessions.