I needed the loo while shopping, so I rushed into a cubicle, dropped my shorts, and sat down.

It was then I noticed a hole in the wall. Suddenly to my surprise, a huge black cock appeared. The biggest cock I had seen. About ten inches.

Without thinking I grabbed it. It twitched in my hand as I started to stroke and pull on the foreskin. I don't know what made me do it, but before I had time to think, stream after stream of hot cum shot up my arm.

Before I knew it, the cock had gone.