I want to share something with you that happened in my childhood. It involved my brother and me, and to this day it has been a landmark in my life.
When I was 16 years old, I had a brother who was 13 (Mike). We lived with both parents, and both Mike and I had our own rooms. I knew that he was going through puberty, but I had never seen him nude or known if he masturbated or not.
One day, I had just gotten home. Mike was already there because he was in a different school than me, so he got out earlier. We both had to ride the bus home every day. I had a pretty tiring day, and I was ready to go to my room. So I went upstairs, and thought that it would be a good idea to masturbate before I took a nap. So as I got into my room, I set my books down and began to take off my clothes. I laid on my bed, and as I was laying there, I heard a thump in my closet. I immediately stood up and saw my brother peaking out the back of the dark closet. I yelled at him to get out. He said that he just wanted to scare me once I got to my room. I told him to leave, and as he was walking out, I saw a bulge in his pants. I was still mad, but this sort of turned me on.
Then randomly out of nowhere I asked him if he had ever masturbated before. He said yes, and I was kind of excited. I asked him if we could do it together. Now, I don't know what was in me, I guess I was just curious. But I most certainly was not gay.
I told Mike to take off his clothes, so he did. He took off his shirt, and I noticed that he had a little armpit hair, but not much. And he took off his pants and boxers, and he had close to a four and a half inch dick, with a decent amount of pubes above it. He was growing up. I was I think about 6 inches and I had mostly all of my pubes and armpit hair that I would ever get.
We both sat on the bed, and began to stroke our own dicks. At this point in time, it was my first time seeing anyone nude, apart from magazines and stuff. He kept jerking himself until he shot four ropes of cum onto his chest. It was not a lot, but for his age it was a decent amount. Then soon after, I came with more cum than him on my chest. We both grabbed a towel and wiped ourselves off.