This really happened to me, and I am grateful that it did. I met up with Cory at a recent school reunion, and would do it again in a moment
Back when I was a lad about 12, a friend of mine used to tell me about 'getting some sperm' and how good it felt. While on a scout outing, he showed me exactly what he was talking about.
Cory was my age, but had matured early for his age, and sported a very large penis-about 8 inches and very thick. My own cock was much smaller, about 4 or 5 inches, but with the propensity for getting very, very hard.
So we're sitting in the tent, in our underwear, and Cory shows me that to wank, you have to make a circle with your fingers, and stroke up and down with a rhythmic motion to achieve an orgasm.
I was totally turned on seeing my friends huge cock, and mimicked his motions. It felt pretty good, but I couldn't get the rhythm down. Seeing my dilemma, Cory reached over and helped solve my problem, and began to stroke my straining erection with his hand.
This was a total turn on, and I reached for his huge penis, which was so thick, that my fingers couldn't touch when wrappped around it.
So as he stroked, the tight exciting feeling grew in my groin, and I had a dry orgasm that was very pleasing.
Being a good scout, I immediately continued to stroke Cory's cock as he had stroked mine. As I mentioned, his penis was very large, and as we advanced to high school, he was the envy of many in the locker room in terms of sheer size and girth. To my amazement, his thick dick got even larger in my hand and his ragged breathing signalled an impending orgasm.
Cory delivered about 7 or 8 spurts of thick semen, covering my hands, his belly and part of his sleeping bag.
We repeated this scenario many times, also bringing other scouts into our jack off sessions.
To this day, having a hot wife and lots of great sex, fulfilling my every fantasy, I still jerk off to the memory of my first hand job, both giving and receiving.