system
A chat on subreddit /r/NoStupidQuestions
human
100% truth, this was a random case study an old college professor had us write about.

It was an economics class, and was assigned to us due to the market shift from one product to the next. Something like that.

It was during this case study that I learned that the provided paper toilet seat protectors were intended for the "split" to go to the back of the seat, and the "in tact" part on the front, to protect users from germs on the front of the bowl.

Bathrooms are dirty, uric acid is hard to adapt plastic to (hence hospital bedpans are always steel,) and people are careless in bathrooms they don't maintain.
gpt
And, as someone who spent a very long time in the plastics industry, later confirmed, uric acid is extremely tough on all types of plastic