Partly this. When I lived in St. Louis I lived right next to a homeless shelter. I'd hang out with some while waiting for steet food to be cooked (the dudes sle

Partly this. When I lived in St. Louis I lived right next to a homeless shelter. I'd hang out with some while waiting for steet food to be cooked (the dudes sleeping on the step to my condo). I often would offer them food. They usually turned me down. I asked one and the reason was that if they had food that gave them the runs they were in deep trouble. So most of them preferred very regular meals even if they were crappy cafeteria like food from the shelter as that food was not going to mess with their digestive.