I was walking in the forest when, for some reason, my cock got rock hard and my balls started to swell. I wasn't sure if I'd triggered a flower or what. But I had to try and hide my hard-on somehow as this is a public park area. Quickly I moved to just off the track, took off my top as I knew it would get messy. With my throbbing cock in one hand, my balls pulsating I start stroking. Faster and faster, trying to edge and cum as I hear a crack in the forest, someone is coming