Psychological / social norms
Taboo vs. practicality: It’s a behavior that clashes with social conditioning – “clean” vs. “dirty” spaces – even if, logically, everything goes down the same drain.
Private rebellion: Doing something harmless that society says is “gross” can feel strangely liberating. Like heating ice cream in the microwave or putting fries in milkshakes.
Design / Infrastructure
As far as the plumbing is concerned, everything is fine. Shower and toilet drains often flow into the same sewer line.
Urban planners and designers don’t build with this behavior in mind, but maybe they should—dual-use, water-saving features could be the future.
Cultural lens
Some cultures are more open or pragmatic when it comes to bodily functions.
In others, it is deeply frowned upon – even if there is no functional reason.
