I was 17 at the time. My cousin, who was 13, came down for the summer. I had not seen him since he was 10. When we were young we did the show me yours and I'll show you mine thing. He came over and starting talking about that and saying how big his had got and how he shoot's cum.
He had a porn magazine and asked if I had some, which I did. We started looking through them rubbing our cocks through our pants. When he asked if I wanted to jerk off, I was like 'Yea'.
We pulled down our pants, looking over checking each others cocks out and started stroking. I kept stopping to turn the page or grab another magazine, when he reached over and said let me do it for you and started jerking my cock. He was asking if I liked it and if it felt good, it was great.
Next thing I reached over and said let me do you too. So we have one magazine on the desk jerking each other off to a great cum. That summer we both had a helping hand. We helped each other for a lot of years, and not just by hand!!