well.. this happened to me when I was about 12
Me and a friend were sitting in his room watching tv and it got to around 11 when we finally got to sleep. I had just gotten hard and I didnt want to jerk off with him right next to me so I thought I should ask him first.
'Do you mind if I jerk off right now?' 'what's that?' 'you don't know?' 'nope.'
'Ok, I'll teach you, first pull down your pants' so he did. I reached into his underwear and pulled out his three incher and started rubbing it slowly. 'how does that feel' 'awesome.'
'ok, do you think you can do it on your own' 'sure.'
So I dropped my shorts and boxers and we both jerked off facing each other, I took off the rest of my clothes and asked if he could do the same, and he did. We were both sitting there naked playing with ourselves when he asked
'wanna do it to each other?' 'sure, sit next to me.'
We grabbed each others cocks and proceeded to wank each other for what seemed like a long time. We both came on each other and smiled, then he said 'next time we do this, let's invite more people, and we did, but that's for next time.