masturbation in the woods after school

I had to go through a small section of the woods on my way home from school, and if I was let out too late or too early (so there were fewer people around), I would sometimes run into the bushes for a few minutes to have fun.

I would put down my bag or coat and touch myself under my skirt. I would find a spot where I could see people walking by, but I would stay pretty hidden unless they were looking too closely. It usually only lasted a few minutes before I got scared or pleasured myself, but once I lasted over an hour.