I love this site.
Some of my parent's friends from out of town came to visit and spent the night at our house. I had to sleep with my brother and the visitors slept in my room. At the time I was 13 and my brother was 17.
When we were getting ready for bed he asked me if I knew how to masturbate. I said I didn't, so then like a good big brother he said, 'I will have to teach you.' I told him I would love to learn.
He told me to take off all of my clothes, so I did and he did the same. I looked at his huge eight inches long uncut cock and all I could say was, 'Wow!' He told me my cock was good for my age, but it was only five inches long and also uncut.
Next he lay on the bed and began to masturbate. I watched him for a while, copied him and we came at about the same time. Then we took a shower together and went to bed in the nude. We did it again the next morning and now do it together every time we are alone.