Reading the attached story reminded me of one of my similar experiences.
We were both 13 or 14 at the time and on a long hike in the woods on a trail following a river when my friend Eric began talking about a playful session he had had with his girlfriend the night before. His description of her beautiful tits and how they had pleasured their genitals soon had us both hard.
He noticed the bulge in my shorts and asked, 'Are you going to do anything about that.' I asked, 'Where can we jack off.' He replied that we could go to his house because no one was home. There we went, went to his room, stripped, and sat on the floor facing one another. We began stroking our own dicks, at first watching the other's progress, when he asked if he could do me. I agreed if I could do him. We slid closer to each other, and got side by side so we could reach the other dick. Then we began jacking one another's dicks. It was a huge turn on, and both of us shot loads of thick cum.