Public restroom pervert.

I was working in a big building that had, at any given time, hundreds of people per floor. Half of the people were employees, while the other half were members of the general public there for various reasons. It was the sort of place where just about anybody could walk in and aimlessly wander the halls without really being noticed. This story is about a weirdo who may have had a legitimate reason for being there, or may have just been there to get his kicks.

It was still earlier in the morning, and I left my work area to go take a dump. I took the stairs to the next floor down, because I figured I was less likely to have people I knew smelling my waste should they need to use the facilities. The restroom was empty, so I took my place in one of the stalls and hung my coat on the stall door.

A few seconds after I sat down, somebody else came into the restroom. He took the stall next to mine, and I noticed his red sneakers. I heard him spit a couple times, and then I began to hear a vigorous rubbing sound coming from his stall. It sounded like he was rubbing his hands together very quickly and rhythmically, occasionally stopping and spitting.
There's no fucking way he's doing what I think he is, I thought.

This continued for about a minute, and then he confirmed my suspicions when I heard him speed up his rubbing before abruptly stopping, grunting loudly.

"Uh, unnh, yeah, unnnhh, yeah!"

I hoped he would leave so I could finish pooping, but I heard him spit and start doing it again a few seconds later. I quickly wiped my ass, rinsed my hands, and got out of there. I went down another flight of stairs to the bottom floor. I did my business in the restroom down there and then left to go back to my job.

When I got to the stairwell, I looked back for some reason. Entering the restroom I had just been in was a young guy, probably in his mid or late twenties. He wore a baseball cap, flannel shirt, and a pair of jeans.

And a pair of red sneakers.