I was just approaching puberty. I went into the shower room of the school gym after the school had finished. There was a guy aged around seventeen showering. He spotted me and said Hi. I couldn't stop staring at his penis. It was so large compared to mine. Uncut and I guess slighly engorged from his washing it. 'I was just about to masterbate' he said... 'you know what that is don't you?' I stammered 'of course'. He asked me if I had ever masterbated and I told him that I hadn't. 'You don't know what you are missing, let me show you'.
With that he pulled on his foreskin (I am cut) and it started to grow. When he had a full erection he asked me if I would like to touch it. I copied his jerking movement, it felt so big and very hard with a dark purple head and brownish stalk. I guess it was about eight inches and rather thick but at that time when my cock was only about four inches and rather thin it seemed even more gigantic! He let me jerk it for a while but as my hands were small (I was a very little guy) I think I was making no progress for him so he said that he would continue himself.
He started jerking again all the time staring at me. I was completely amazed by his movements and was watching very intently. He pulled his foreskin over the head and let it slip back, It seemed to me that he had a completely different sex organ to mine, large and powerful with this amazing foreskin. Finally his eyes glazed and he said 'oh oh...here I come.' Great wads of spunk arched from his cock...I just couldn't believe it, I could see it pulsate. When he had finally stopped pumping he said 'Try it yourself' he said. 'I shall when I get home' I said. 'Let me know how you get on...you'll love it!' he said.
That was the beginning of my masterbating frenzy, the first few times literally bowled me over with the intense pleasure.
I sneaked back to meet up with him in the shower room a few days later and told him of my success.
I showed him once as well...but that's another story.