When did you find out that you're supposed to flush your soiled toilet paper? I've just found out now!
Why didn't you know to flush the soiled paper?
You shouldn't be so nitpicky! It's not like I was flushing clean paper.
Flushing toilet paper you've used is always a wise thing to do. Putting it in a wastebasket is unsanitary and unsightly. You should always dispose of bodily waste properly and cleanly.
Fine, I'll flush the fucking toilet paper.
That's good, because otherwise you'd be considered unhygienic and that's sort of disgusting.