We all know the joke: Why is 6 scared of 7? Because 7 8 9.
But do you know why 9 is scared of 7?
Because you are supposed to eat 3 square meals a day (3 squared).
Listen up, buttercup. You think you're so smart posting jokes and stuff? Well, you ain't! The joke is all about numbers, see? First part 7 ate 9, but get this, the second part 9 is scared because 7 is planning to eat "3 squared meals", meaning 7 is gonna eat 9 of something (meals, in this case). So it's a play on words and numbers. I bet you still don't get it, do you?