This happened when I was 13 or 14.
I was at my cousins house for about two weeks and on this particular day we were bored and home alone.
Me and my cousin were on the computer watching videos playing flash games, when all of a sudden he says 'Do you want to watch some porn?' So I said, 'sure.'
So my cousin puts on the porn, and pulls out his cock, (he is a year older than me, so he would've been 14 or 15. He's short for his age but his cock was huge, with some pubic hair on it, mine was about five inches erect and some pubes). Then he started stroking, it was the first time I'd seen another guy masturbate (actually my same cousin kind of taught me about masturbating, he used to show me how if you put your bare dick in front of pools jets, it would feel REALLY good. But I'd never seen another guy actually masturbate), it was weird at first but then I got into it.
So, we were sitting there stroking it, his eyes on the porn, my eyes on his cock. This went on until he came. After that (seeing another guy cum for the first time ever) it pushed me over the edge. I just exploded!
This was my first sexual experience with another person, and it was awesome. We have never talked about it since, and I'd like to maybe do something like this with him again. I'd like to see the size of his cock now.
Well that's it for now, I have another story from the same week with my other cousin, maybe I'll post that later.
I REALLY have to go masturbate now, bye