Public toilets can be a nuisance. Not only, because people do a lot of things on purpose with them such as throwing paper towels down them to clog them up, but also because they spread a ton of germs. Just one toilet without a seat cover could easily spread hundreds of millions to billions of germ specimens all over the place when someone flushes the toilet. Hence, the ventilation systems in that building keep these germs aloft and floating everywhere like a huge Mardi Gras celebration! Therefore, what was once a fully contained situation turns into a cataclysmic series of events in which billions of germs reach a multitude of different destinations such as people's homes, inside cars, on trains, inside airplanes, on bus poles, and even inside people's bodies when they rub their noses or eat food with unclean hands. And God help us if we could actually see all of these billions of germs spreading and multiplying into trillions of offspring! I think no one would be able to get to sleep over that nightmare vision!!