How are fats, oils, and grease getting into the sewer system, though? Are there enough of those materials left in our poop to conglomerate like that? Or are those from industrial users on the sewer system?
That seems like a great way to plug your own drains.
Also, I was under the impression that restaurants could sell their frying oil for recycling? This is a weakly held impression to be sure but I want to remember reading something about it.
Maybe you have a drain phobia? Mr. Rogers had a song one day on his show called "you can never go down the drain" which was supposed to stop kids who were scared of that happening... but until he sang that song, the concept of me going down a drain was not something I had considered, so I was terrified of it for years and had to jump out of the bath the minute my mom pulled the plug.
On the other hand, you're probably not as weird as I am, so you probably just forgot.
Huh, I know I used to watch Mr Rogers when I was real little, but I have few memories from that far back. But I also, to this day, get uncomfortable putting my fingers or toes near drains.
I need to hear this song. Maybe it'll trigger some latent memory and unlock some long-forgotten trauma.