Do you flush tampons?
I swear everyone does it, but I just got a lecture from my plumber and then FI was like "that's obvious, everyone knows that!"
I KNEW that it wasn't great, and was very careful about it in my previous Victorian era house, but never was any other place.
ETA: Obviously this is a different issue in septic systems, so I assume those people don't.
And this also isn't what I actually have the plumber here for, but he made a point to show me all of the "things with strings" laid out in globs on my garage floor!