It happened when I was thirteen-years-old.
The age of thirteen was a peak of sorts for my puberty. I would fondle my cock just to get it hard late at night. Then I would look at it in the mirror and touch my balls for stimulation. Well I have heard the term jerking off but did not know what it was really about.
So one day at school a few of my freinds were all going into the locker rooms to hang out during recess. When we got there we all sat in the changing room. We all sat there talking about sex, laughing and joking about everything. We would go in there sometimes and show each other our boners and what not, but that's all we ever did, so far anyway.
Well one of the boys asked everyone if they had jerked off? The three of us said no. But we all admitted to playing with ourselves. They he asked us again if we had ever had an orgasm. We were all like what's that. He explained about how after a while of jerking off you shoot cum out of your cock. He described his cum as white thick goo. He said he wanted to show us. I was very excited about it and the others were too, so we all said sure.
He stood up and began taking off his jeans. When he pulled them down he sat back on the bench and reached into his briefs. He pulled out his cock which was sticking straight up and began tugging at it quite fast. He told us to get close to him so we could see his cum. We all sat right next to him and watched him jerk his hard cock. I remember getting very horny looking at his cock. It must have been around five and a half inches.
Then he started jerking faster. He began to breathe hard and said 'I'm going to cum.' We all moved in a little closer and wow. A string of white goo came shooting out of his cock head followed by another. Then a few thick drops oozed out as he began to slow his rhythm.
We were all staring at his softening cock and this white goo he had just spewed onto his briefs, when he said to touch it, feel it. So I reached out with my finger and began rubbing the tip of his head gathering up a bit of his cum. I pinched it in my finger tips until it got very sticky.
Well after that we all planned to jerk off later that evening after school but I don't want to write a long story so I will continue it another day. Thanks.