When I was 13, and masturbating for about 3 years, I tried to get in a saturday morning session when I had the house to myself.
By the time I was 13, I had been jacking off for three years, but had only been comming for the last 6 months. I usually jacked about 3 or 4 times during the week, but on the weekends, I tried to get in as many sessions as possible usually managing 3 or 4 sessions a day from friday night to sunday night sometimes as many as 12 times on a weekend. With that prospect in mind, my pecker was at attention all weekend long. On this saturday morning, after the last of my family left, I quickly got nude, lubed up, and began the first session. I didn't check the doors but assumed that they were locked by my departing family members. I was wrong. When I was about 15 minutes into the first session, I felt the unmistakable approach of the moment of truth when my abdominal muscles began to tense up, my peter shaft turned red, and with precome flowing as usual my peter took on its own life and about 4 ropes of come sprang out of it followed by prolonged oozing. Still slowly stroking, and transfixed by the sight of my well beaten meat, I began returning to the real world when to my great surprise and shame I heard a voice say,' That was a fantastic load.' I looked up, and saw my friend Alan who was the same age as I. He said not to be ashamed, since he did it every day. It turned out that he had rung the bell several times, then tried the door which was open. He called my name, and when he didn't get a response, walked in the direction of a slapping noise that he heard comming from my room. When he looked in, he saw me nude lying on a beach towel stroking my well lubed peter, and obviously transported to teen heaven by the gratifying peter pleasure. He said he must have watched for 5 minutes without my noticing him. He asked how many times had I done it that day. The answer was twice, and I wanted to get in another 2 before bed time. He asked if he could join in the next one which I agreed to, and after half an hour we got in our first mutual jack off.