I WAS 11, FOUND IT BY MYSELF, USED MY SPIT TO LUBE THE FORESKIN AND ROLLED IT BACK, LATER STARTED HAVING ERECTIONS AND DID THE SAME, AND THEM CAME CUM :p

My answer depends on whether you consider jacking off to be when you were able to cum, or just when you started playing with your cock. If it is the former, then 11, if the latter then 6, thanks to the little girl who sat next to me in class and let me feel her bottom which in turn made my cock stiff which I found pleasurable to feel. Other than that, my cock didn't get stiff a lot until I was 8 when a friend got me to touch his dick, and he touched mine, and that became my favourite game for a few years until another friend showed me how to wank properly and cum when we were 11.

When I was 5 I figured out how to use my mom's back massager to massage my cock... I didn't cum or anything but, the sensation was amazing... so I did that until I was 10 or 11. That's when I found my uncle's porn stash. There was a video of a guy stroking his cock into some chicks mouth... I don't know why but, I thought I should try what the guy was doing... and the rest was history! lol

Found out I got erect for no real reason, used to play or stroke it, no result, must have been about 7-8, but the first time I shot my load was playing with my mates sister, she was early teems and the "doctor-doctor" got more feely feely, I remember rubbing my very stiff cock on het smooth pussy, and whammy, no real warning, came all over her stomach, I must have been about 12, well this went on for months, bloody good it was too, also figured out how to wank or stroke with out getting too enthusiastic, still remember her very well, would love to meet up again