Love the site and the stories which really turn me on, this is my first contribution.
I had been thinking about masturbating at school for some time, and with finals aproaching I thought I might get the chance.
So on Friday, once I finished my last test I asked if I could go to the bathroom. I wanted to make it quick so people wouldn't wonder what I was doing. I sat in the stall, put some saliva on my cock, and began pumping fast.
Someone came in and through the crack between the door and the wall I could see his back as he was standing at the urinal. Just knowing I was so close to someone who didn't know what I was doing nearly sent me over the edge.
Once he left, I stood and left the stall, walking to the urinal. I once again began to feriously stroke my pulsing cock. It wasn't long before I erupted in a fabulous orgasm, only increased by the fact that someone could walk in at any moment. Once I stopped cumming, I was prepared to milk anything else out and then clean up when the door opened.
A kid who sits behind me in the class I had come from asked me 'Did you finish?' I got all paranoid, thinking 'Finish what? Does he know?' and then I realized he was referring to the test. I told him yes and that it was pretty easy, then I walked over and washed my hands. He finished and caught up to me in the hall and we both walked into class at the same time. I kept thinking everyone was looking at me, or had known what I had done, but they couldn't have.
Anyway, it was a great expirience although I don't know if I'll do it again. At least I can now say I've tried it in public.