Gym Showers

I have an obsession with jacking off in places that I might get caught. In college the school gym had a huge locker room. I had an early class but would go workout beforehand when no one was at the gym. I would shower in the group of showers at the back of the locker room. It was an open shower with 4 shower heads. I managed to jack off to cumming for the first 2 months of the semester without anyone walking in. Sometime that October, I was in my normal routine when I heard footsteps. I turn to see a guy in a towel looking at me jacking off. I say sorry and turn the other way. He left and went to another stall. I still finished myself off.