I am fortunate that I have participated in many Group masturbation sessions. Starting early with my friends' teenager circle-jerks, then many experiences when I was in college, and then, later as an adult.
I have so many wonderful memories of these experiences, especially one that occurred in 1996, in the forest above the legal Nudist beach at Rooster Rock State Park, on the Oregon State side of the Columbia River. Truly awesome, as several men joined in, one after the other, openly masturbating and fully enjoying showing-off their cocks as they pleasured themselves. Some were nude, some were clothed, but stroking their cocks out of the fly's of their pants.
I lost count of the number of men who entered the grove in the woods to join in on our circle-jerk. I think it was about 12 to 14 men all in all. So wonderful seeing them all enjoying masturbating their cocks openly, together!
In my dreams, I re-experience that fun, horny, sunny afternoon everyday!