I was of course rock hard and dripping from the moment I got near the clearing, and stayed that way for the next half an hour as I walked around. The feeling was so blissful that I was determined not to cum, so I restrained myself to lightly stroking my shaft and shaved pubic area.
Suddenly, when I was in the middle of the clearing with my eyes closed, tickling my balls, I heard voices and movement behind me. I dashed as quickly as I could into the trees and squatted out of sight, my heart pounding. I heard the voices and movement getting nearer, but I couldn't see anyone. I crept towards the noise until I could see the path through the forest. There was a group of six walking along it of mixed age, including 2 girls about as old as me. I squatted down as they approached, totally aware of my nakedness, terrified and incredibly aroused. I couldn't stop touching myself.
Time seemed to stand still as they drew level with me, about 40 yards away. They were talking about a TV show that was popular at the time, predicting what would happen in the next episode. The girls wore bikini tops and short shorts. I watched their bodies move as I crouched there stroking my shaft.
They started to move further away from me, and I began to breathe more freely. As I watched them I suddenly felt an uncontrollable urge to expose myself. I stood up straight, stroking my cock as I looked after them.
I couldn't believe what I was doing. How had I got to this point? I was totally naked in a forest, I had shaved off all my pubic hair, and I was flashing a group of complete strangers as I masturbated! One of the girls half turned to talk to the person behind her, and I squatted down, cumming extremely hard all over the bushes in front of me. I must have moaned or sighed, as the girl looked in my direction suddenly. I peered through the leaves terrified as my body rocked, my balls twitching as I continued to spurt cum. After a moment's pause that felt like an eternity, the girl turned around and kept walking with the rest of the group.
I struggled to my feet, feeling exhausted, exhilarated, dirty and extremely guilty. I couldn't believe what I had done. But the intensity of that moment was like nothing I had experienced before.