This happened in July 2007 while I was visiting a Nudist resort in Ontario. I had been going there regularly for evening visits while travelling to Toronto on business trips.
Up until this visit there was no sex involved, I would go to the indoor and outdoor pool and hot tub and relax, nude of course. It was usually the same, non eventful except plenty of nude people around.
On this visit I parked my rental car in the open parking lot across from the Tennis courts and had just stripped down and locked up valuables in the car. So there I was, nude, except for Tennis shoes and a towel over my shoulder when I heard this voice call out.
There was quite a strong breeze blowing and I felt it against my cock, which was tingling as I was really horny, my cock, circumcised, soft is really small and my ball sac normally does not hang low although my balls are larger than average. It was a hot summer day so my balls were full and hanging low due to the heat.
Anyways, I looked across the parking lot and these two guys were waving at me, I am well built with no fat and work out often and have a great chest and as I walked over I felt my cock swell a bit to my horror! As I reached their car they asked if I was here for the Tennis game the taller guy said I looked like a Tennis player!
For some reason my cock was getting harder and I was trying to hide it with the towel, it was sticking straight out! After I went to shake hands with the first guy I dropped my car keys and when I stood up after picking up the keys the second guy quickly grabbed my circumcised cock and said what have we here!! He let go of it and laughed, I said sorry I am embarrassed! He said why with a big cock like that you should be proud and laughed. His friend said 'This guy is a grower' that is a guy whose cock is small when soft but changes enormously when hard, well now it was rock hard and I was hiding it with the towel!
He asked is that eight inches? I said almost just over 7 3/4 and pretty thick? Yes about 6 1/2! mmm, the girls must like that!
Well he said how about joining us at our place for a cool drink or coffee before Tennis? You can't gp to the Club House like that!
We walked over to their fifth wheel and trailer in the camp ground area and laughed about my hard on it was shrinking back down but still a bit swollen since I had been excited by him grabbing it as I am Bi Curious..
Inside the trailer I sat with my legs crossed as I had a cold soda. I asked do you mind and they said what, If I just relax and stop trying to hide this boner and uncrossed my legs, I pressed down at the base and the big cock was pointing up for all to see! Bill said that really is a big cock, he walked over and took it in hand and I groaned. I said it had turned me on when he had touched it in the parking lot and now I just want to cum!
Mmmm it is rock hard too and he started stroking it as I lay back in the chair...his friend came over and stood by watching as I moaned and then I said careful I am gonna cum and the first spurt hit my chest and then the other spurts all over my chest and belly...he kept stroking and cum dribbled all over his hands..!!! I was shocked as they both laughed, feel better now?
I cleaned up and thought it was over but stayed somewhat hard, we had a bite to eat and they said we want you to return the favor and masturbate for us and a friend! Bill left and came back with this female friend, a plump young woman about 22 who had nice boobs and a shaved pussy.
Bill introduced us and we sat around, then she said, so you are a grower? Show me! I spread my legs and she said masturbate for us and I started stroking it and soon it was fully hard! Nice cock she said, long and thick and smooth!
They all just sat there watching and she said make it cum and I stroked and soon she got on her knees really close to me watching, I was staring at her nice boobs and then groaned as she reached over and took hold of my swollen thick cock and said 'let me finish this' then in about five strokes I dribbled cum all over her hands as as she stroked it and cupped my balls then she leaned forward and licked the cum off her hands and then they clapped!
The guys laughed and said you should have seen him before it had just squirted out all over!! Lets play Tennis and again I cleaned up and we headed out....more later on the evening fun that followed