Its weird that certain things can turn us on isn't it?
The other night, I was on my way home and I passed by a park with a small building with a ladies and mens public restroom. I've jacked off in restrooms like that before with friends, when I was about twelve or fourteen, just being silly, but I had never got completely naked in one before.
I had some spare time so I decided to pull in and act like I was just going to use the restroom. It was late and the park was empty, so I just walked into the ladies side (the light bulb in the men's was broken, and I wanted to see myself) and locked the door. I took my shirt off and then my shorts and boxers. Then I decided I might as well lose my shoes and socks too and be totally naked.
Once I was naked I got a little lotion that I brought in with me and started to jack off. The squishy noise was really loud in the concrete bathroom, so I flushed the toilet to drown it out and jacked off madly. I don't know why I drowned it out but I don't want public indecency on my record (if this was even a crime no one could see me). After a few more flushes I came with a huge orgasm and then cleaned up in the sink. I did have the urge, when I first got naked, to step out of the bathroom for a minute and walk around naked in the park, but I would have been in direct light and I didn't want to get into trouble. I may be more daring next time and try it. I'll let you know.