First time is always the best
When we were 12-13-14 my first cousin would spend the weekend nights at my house. I had a large bed and we would sleep together. I had learned about masturbation from a school friend but my cousin knew nothing about it. So I decided I just had to tell him and show him how it was done. So we got into a card game right there on the bed playing strip poker. Ironically, the loser would have to be masturbated, whereas it should have been the other way around. (That was changed as we progressed).
Anyway, I remember that he lost first and was naked. It was the first time I had seen his dick and it was much much smaller than mine even though we were the same age, maybe a few months apart. Mine was about six to seven inches at that time and his barely fit in my hand. That didn't seem to matter much and I lubed my hand and started stroking him. He said 'man that feels good' and it only took him about a minute to shoot. Then it was his turn,(without playing another round of poker) and when he took hold of my dick I had never ever felt anything more wonderful in my life! He commented about the size and all and then did what I had done to him. I being a bit more experienced at masturbating took a bit longer and shot in about three minutes. Anyway that was the beginning of a long period throughout high school of masturbating one another.
We are both married now, he has no children, I have one little one. We seldom if at all see each other but if he is reading this I would love a comment on these so memorable occasions we shared!