Ok, so this happened over the summer a few years ago, and my 13 year old cousin Eric was visiting like he always does. We had both seen each others penis before since we had compared dicks and such when we were younger, however we had never jacked off. Well Eric and I were sitting around in my room and our parents were out somewhere. Suddenly Eric tells me that a few months ago, he had 'discovered' that if he played with his penis, it felt good. I briefly mentioned that it was called jacking off and all teenage boys did it including me. However nothing more happened and we didn't talk about it until a few days later when I was in my room and he walked in on me jacking off. So I say 'Hey Eric you want to join me?'
He runs in and sits on my bed and pulls out his four incher while at the same time staring open eyed at my much larger penis.
'Dang, your penis is HUGE!' he manages to blurt out.
'Don't worry yours will get this big too.' (I was a bit of an early bloomer while he was more of a later bloomer) Well anyway we both started stroking away. I took a few glances out his way and noticed him doing the same. Well I started to feel the cum rising up inside my penis and before long I was shooting long ropes of my boy juice all over the place. Not a second later, Eric squirts out a few drops of his own cum. We cleaned up and kept talking about different techniques. In fact we numbered all our favorite ways and would get together every day and both jack off using different technique.
Hope you enjoyed, there are more stories about me and my cousin for me to tell.