Little Johnny once bought his granny a very fine toilet brush but when he went to visit her a few weeks later, there wasn’t a sign of it in the bathroom.
Little Johnny asked his grandma, “Granny, what happened to the loo brush I gave you?”
“Darling, I really didn’t like it. After all those years, I’ve gotten used to the toilet paper, and this new thing was just far too scratchy. “
This joke is included in the Black Book of Jokes. You can order it from here.