Believe it or not, our nine year old son made this one up the other day. He was trying to make up a funny joke and was failing miserably when he suddenly stumbled onto this one. The fact that it made sense and was actually kind of funny/clever surprised us so much that we both burst out laughing. So… Without further ado…
Q: Why did the rope get in trouble at school?
A: Because he was knotty!
(It’s quite possible that this joke already exists, but I’m claiming it as his since neither of us had ever heard it before.)