This happened when I was about 16. My cousin came to visit in the summer. He was about 13. My parents told me that I would have to share my room as well as my bed. There was no way I wanted to share my bed. My cousin was just as tall and big as I was so it was hard to tell that he was three years younger then me. The first night was the start of a very SPECIAL SUMMER.
That night my parents went out with some friends and my cousin and I were left home alone. After watching TV for hours we went to my room to go to bed. I had a full size bed and we decided that he would sleep at one end and I at the other. It was very hot so we both had only our boxers on. Later in the night I was awakened by my cousins foot in my face, so I tried to move his leg, by doing this it made his penis fall out the side of his boxers. I had never see another male penis that close up or touch another guys penis but I wanted to touch it so very bad. After about 10 to 15 min I reached in to his boxers and wrapped my hand around his penis and hoped that he would not wake up. As I held it in my hand for about 5 mins it started to get hard in my hand. Still hoping that he would not wake up his penis grew until he was fully erect. I could not believe the size of this 13 year-old penis. It was about 8 1/2 inches and very thick. I was about 8 inches but not that thick and I was older. Just then he woke up and caught me with his dick in my hand. I tried to make out that I was sleeping, but I knew that I was busted. He called me and asked if I was sleeping. I told me that I was awake he then asked me if I had ever masturbated. I told him yes. He asked me if I would show him how to do it because he had never done it before and did not know how. He also told me that he was not sleeping and that he knew that I had been playing with his penis and that it felt good.
After turning on the lights we both took off our boxers, now I could see that my 13 year-old cousins penis really was bigger than I thought. He was about 9 inches and very thick. I wrapped my hand around his dick and started jacking him off. After about 15 minutes he blew his load all over me. After he was done I told him to do me. I took his hand to my dick and showed him how it was done. I blew my load in about 5 min. We did this for hours that night and the whole summer.