Back when I was 14 and a freshman in high school, I had this friend named Michael. We were friends since about seventh grade and we would often go to each other's houses. We were both 14, skinny, and about the same height.
We would often go into the woods to play games, ride our bikes, play airsoft or paintball, those kinds of things. One day we started to think about girls. One day he asked me if I masturbated, and of course I said yes. He asked me how often I did it and how I learned. Eventually I asked if he wanted to do it, and we agreed.
We both took off our clothes, laid them on the ground and sat on them so we would not get dirty. We were in a secluded area. It was probably a half a mile from where we came. We sat across from each other and examined each other for a while. Then we began to masturbate ourselves. I remember doing it there and having one of the best orgasms I had ever had. I spurted cum onto my chest, and not much later, Michael did the same.
We did this every day for a long time, and eventually we got a 'cum jar' and filled it up as time went on.