This only happened once but we are still friends
When I was 14 a friend and I had spent all day in his parents pool. They were both at work and we had the house to ourselves all day. (Keep in mind we both had girl friends and we are both married now). So after we had finished swimming we went into the house to watch TV. While we were sitting in his basement he mentioned that he had just purchased a new porno. I was all about watching it so he put it in.
I was hard in the first five mins and I think he was too. As we continued watching I stuck my hand in my pants and started rubbing my cock and playing with my balls. When I looked over my friend had done the same. (There was a really hot lesbian scene on). So I decided I would whip it out since we were both doing it anyway and he did the same. Neither one of us said a word. By now we had been jacking and watching the movie for prob 15 mins. I decided to take all of my clothes off and lay down on the floor so I could spread out.
At some point we had found some lotion so I relotioned both of my hands and kept jacking and rubbing my balls and ass. I was really into the movie when I heard him get up. He came over and layed down next to me and grabbed my cock. So I grabbed his and we started jacking each other! As I stroked his dick and balls he did the same to me. We must have done this for an hour before we both came. I had never done this before and haven't since but that was my first hand job (all others by girls)and it felt great. We have watched porn together since then and jacked but we have never helped each other since.