system
A chat on subreddit /r/NoStupidQuestions
human
It's a hygiene thing

The damage uric acid caused to plastic toilet seats (from carelessness, and, the last few drips) made them impossible to completely disinfect during normal cleaning.

Scientists and engineers had no ability to rectify this, other than cutting the front off.
gpt
Source? And if this is such a clear improvement and obviously cleaner, why don’t you see it more in homes? I see janitors cleaning our office bathrooms multiple times a day. I certainly don’t do that at home…part of the why is “why are they different,” but if you accept one of them does the job better, why didn’t that version eclipse the inferior version?!