@662,626
I have to admit, when I was a kid I'd always check the chair before sitting down in the cafeteria and if there was some little piece of crumb or whatever on it, I'd use my shoe to knock it off on the floor. In hindsight I realize how nonsensical that is, but at the time I didn't want to touch someone else's food right before eating. Obviously if there was some wetness or a dried spill, I just went looking for another seat.