refactoring in the shower
After a while the plug-hole gets so gunked up tackling it becomes a truly repulsive task. It actually clogs the plug-hole. The shower fills with water - it starts turning into a bath! But it wasn't designed as a bath. Splashes leak over the lip of the door. Water collects under the shower base where it's not visible. Not at first anyway. After a while the ceiling below the shower starts to discolour in a tell-tale circular pattern. But it goes unnoticed. At first anyway. Soon the ring grows so large it's unmissable. But it's ignored. After all, it's a full-scale call-the-plumber-and-tiler job now.
Some houses contain a mixture of teenagers and adults. When a teenager showers sometimes the plug-hole is gunk free and there's a dry towel but sometimes the plug-hole is gunked up and there's no dry towel. They can't quite understand this. But they never clean the plug-hole and never put up a clean dry towel. When an adult showers sometimes there's a build-up of plug-hole-gunk and no dry towel. They know the previous shower-goer was a teenager. Sometimes there's no plug-hole-gunk and there is a dry towel. They know the previous shower-goer was an adult. When they've finished they clean out any plug-hole-gunk and put up a new dry towel.
Some houses house only responsible adults. Whenever they start to shower they don't notice any gunk around the plug-hole because there never is any. And there's always a fresh clean towel. After they've showered they clear any plug-hole gunk and put up a new dry towel.