The love between Brothers

It all started when I was 10 and my brother was 12.
We grew up being very close to each other. We were only under 2 years apart, and had a great relationship. We did the typical brother things, espeically horseplay. One day though, the horseplay turned into something different…
We spent the entire day in the pool, and my brother got out first. I followed about 1/2 and hour later. He had already taken a shower and was in his room with the door closed. I walked in (no, we never bothered to knock), and saw him with his dick in his hand. We had seen each other naked just about every day of our lives, so this was nothing new. I had seen him with a hard on, and he had seen me with one, no big deal. This time though, he was yanking and cranking on his dick while looking at a book.
He looked suprised, and tried to cover what he was doing…but it was quite obvious. I jump on the bed and asked what he was looking at. He showed me a torn and nappy looking book with pictures of women naked. I said, “Cool, let me see too!” I started looking and instantly had a hard on. I had played with myself before (actually quite a bit), but did not fully understand the meaning on my dick yet.
My brother asked me if I liked playing with myself.