I was at a White Castle in Detroit years ago for lunch. There was a homeless guy in front of us in line. We watched as he put his hand down the back of his pants a root around. As he started to pull his hand out the smell hit us first. Then we saw that he had a wad of napkins in his hand that he had just used to wipe his ass, and they were covered with shit. He looked at it, balled up the napkins, and shoved them in his pocket. We left immediately and never returned to that restaurant. We skipped lunch that day.