me and my cousin

Back a few years when I was 16 and my cousin was 15, we spent a lot of time together working as well as playing on his parents farm. Both being guys, we had a lot in common. There was a good sized stream that ran through the place, and we often went swimming there. 
One really warm early summer Sunday afternoon he and I went to the stream to swim, the water was warm and we were swimming nude. We ended up talking about sex and i got the biggest hard on. He noticed and then I saw he already had a hard on.
It wasn’t long till he started to stroke my cock and soon we were masturbating each other like mad until he shot his load, I squeezed up on his shaft a few times to get every last drop of cum out of his dick and rubbed the cum all over his cock.
Meanwhile he was stroking me faster and faster and then I came and shot loads of my juice into his hand. We both went back on the water to wash off. 
I said it was great and wouldn't mind you doing that again, so three more times that afternoon we did it again.