I was about 12 or 13 and spent a lot of time with neighborhood friends up in one of the neighbor's tree house. There were a couple of boys I knew my age, Chris and Scott, as well as one girl, Jill, that was like a tomboy and hung out with us. Jill was pretty even back then, and years later she eventually became a cheerleader at our high school.
One afternoon after school, the four of us we were up inside Scott's tree house and the discussion turned to starting a "tough-boy" gang. Jill argued she could do anything physical us boys could, so as an initiation, Scott challenged her to climb on top of the tree house and up a tall branch. Like a circus acrobat, she did. I was frightened even watching her, but she nimbly went to the top.
When she got back, she turned the challenge back on us boys, but none of us were brave enough. Jill chided us as being chicken. Chris, who would later turn out to be gay, suggested that the three boys could be initiated by all of us stripping naked and jacking off in front of each other. I had only recently done it for the first time, alone and in private of course, but never ejaculated. It was also way too embarrassing to talk about it, not only in front of girls, but anyone.
Seeing my and Scott's trepidation, both Chris and Jill began to again make fun of us as being "sissies". Eventually, the thought about climbing out on that limb frightened me enough to accept a more safe, yet utterly embarrassing challenge - particularly if Jill might be watching us.
I said I'd do it, but Jill would have to leave. She angrily protested saying she was the only one that had passed an initiation into to the club, and as a member now, she had a right to witness our initiation too. She was right, of course. Agreeing with her that she should stay and watch, Chris instantly stripped completely nude right in front of her. Scott then followed. With the other two boys completely naked, I felt a little easier getting nude myself, and I did. We sat on the floor, legs spread and facing the same direction, with our backs leaning up against the wall of the tree house. Jill sat in front of us looking at the three of us holding our limp dicks.
With wide eyes and a big smile, Jill watched us play with our penises and balls until we were all erect. She asked us to move our hands away so she could could get a good luck at are erect penises as they pointed straight up. Chris seemed happy to oblige her, "sure!". Scott then said "What's the harm? she's already seen everything...". I agreed, and for a moment, the three of us sat there naked, hands at our sides with full erections. The three of us were comparing each other's hard cock, as was Jill.
We then began to jack off again with everyone still looking at each other's hard cocks in our hands, watching how we did it. Jill especially was fascinated by watching it all. Chris came first, and Scott and I were like "wow!". Upon seeing it, Jill squealed with delight and laughed loudly. Chris then said it was Scott and my turn to cum, and soon Scott did too, followed by Jill's enthusiastic laughter in watching him.
Finally, I was the last one, and it was damned embarrassing as hell as the other three, particularly Jill, were now all looking right at my erect dick in anticipation as I energetically stroked, wanting to get it over. I then ejaculated for the first time. I remember Jill laughing as she watched me squirt my sperm in high arcs and all over my legs. It was one of the most extremely intense moments of my life.
And that was it. We had all passed and joined the "tough-boy" gang, yet it never materialized into any type of club with any purpose or activity. It was almost as though the whole thing was created just for that one moment, but I know Jill didn't mind that.
Over the years that followed, I had made efforts to see Jill nude, cajoling her, pleading with her - but I never saw as much as a breast, nor did the other guys. Yet over time as I remembered back, I learned that I now find it sexually exciting thinking about how I was able to experience that moment in the tree house with her, and wouldn't change a thing. There was a word for it, until I learned about "CFNM", and found this site.