Interesting replies here. I can honestly say I never jacked off with another guy until I was in my mid-twenties and he was a live-in boyfriend. Before that from age 7 on me and my friends sucked each others cocks regularly but we never jacked-off.
I never got too. I don't know if it'd be too thrilling for us late 40s guys to see how out of shape we have become. Hey dude nice balls. Thanks man, I haven't seen my balls in years.