This happened to me and my little brother. He was 11 and I was 15. We were camping with our parents. It was getting late, about 10:00 pm. I wasn't tired so I said, 'I am going to go to the public shower to take a shower.' My little brother said, 'I want to come, too,' so I said 'OK.'
When we got there, we took off all of our clothes and got in. We were next to each other. After a while, I noticed he was taking a few looks at my cock. I looked at his, too. Then, I got an erection and he started to stare at it. He said he never seen a naked person before, and he never seen any other person's erect penis, besides his own.
I said that he could touch it if he wanted to. He did. Right away. I did the same to him. Then I told him to give me a hand job. He said he didn't know how, so I did him so he could learn how. We finaly came all over each other, and then we cleaned up and went back to camp. Just the two of us were in the tent. We had our own sleeping bags, but we only used mine that night. We both took off all of our clothes and fell asleep together in each other's arms.
We are still doing that to this day. We both got a lot better at it.