My first sexual experience was with my cousin. I was 8 and he was 12. He was staying with us for a couple of weeks in the summer, and slept in my big double bed with me.
One night I woke up and could feel his hand in my shorts. He was feeling around my crotch, and started playing with my penis. It felt good and I didn't want him to stop, so I pretended to still be asleep. It got hard, and he kept playing with it, and I could tell that he was playing with himself, too. He started to shake, and just held me really hard, and then he relaxed, breathing hard, and let go of me. He lay back and went to sleep, but I stayed awake for a long time thinking about what he had done and how good it felt.
The next night he did the same thing, and while he was doing it, I could feel like I was building up to something, and really didn't want him to stop. I made a noise and he stopped, realizing I was awake. He asked softly, 'You awake?' I answered that I was, and what he was doing felt good. He asked if I wanted him to keep doing it, and I said yes, so he resumed rubbing my penis, and this time I could turn my head and watch him. He had his shorts pulled down and was rubbing his own penis. It started feeling better and better, and suddenly it felt like a dam had broken in my crotch, and my penis jerked like mad and the most wonderful feeling of my life came over me. Just then my cousin stiffened, too, and he held his hand still as his penis jerked, and a little white liquid came out. I found out later what that was, but at that point I was surprised.
Anyway, we did that together every night after that, and a couple of times during the day. He always did it to me; it wasn't until a couple of years later that I did it to him. I really enjoyed our little secret, and looked forward to his visits when we could do it.