This adventure happened one afternoon when I had just turned 15 and began diving.
By the time I was 15, I was an accomplished masturbator, having been at it for 6 years. When I began, I was 9 going on 10, and had learned the art from an older cousin whom I caught masturbating in the bathroom. He forgot to lock the door, and having to pee, I walked in just as he was past the point of no return. I startled him as he came causing him to shoot all over himself, his clothes, and the floor. I asked for an explaination of the show which he gave, telling me how to produce the same result for myself with the warning not to expect to shoot until I was 12 or 13. I settled into a routine of jacking off 2 or 3 times as week until I began to shoot about the age of 12 when I increased the frequency to once a day, and after a friend and I became jack off buddies increased it to 3 times a day.
On the afternoon in question my friend and I had driven out to a secluded lake, removed our clothes in the car, and began swimming nude. I noticed him staring at my pecker which at that time was always semihard if not fully at attention. He suddenly asked me how often did I jack off. I hesitated to answer, but finally told him truthfully about 3 times a day. I asked him the same question; he replied as often as possible usually once a day. Then he asked if I wanted to get at it together. I agreed and we began jacking with our peckers under water. After about 10 minutes of this, he had a huge orgasm. I followed about 2 minutes later. We relaxed for a few minutes still in the water, and began a conversation about our sexual experiences. He hadn't begun until he was 13, so he shot off the first time he masturbated. He asked how was it possible for me to jack off 3 times a day when I lived at home with parents, brothers, and sisters. I explained that after school, I went to another friend's house who had no siblings and was alone until 6 o'clock. We pretended to study, but really jacked off at least twice. I got in 1 or 2 more at home. He asked how long had I and the friend been at this. I answered since I was 12. He then asked if he could join in the fun. I told him that I would ask. My other friend agreed to his joining in, so the mutual became a cirle jerk.