Because they always leave you stumped!
A cow-culator. haha haha ha... ok, I'll leave.
He says, "Gourmet I be excused?"
Because she was a-Kraid to. Now I think about it, this joke is a bit more "Riddle-y," than say an actual joke.
Sir. Groan worthy penguin jokes(https://allwrong.wordpress.com/2007/10/05/penguin-riddles/)
Leaf me alone.
I'm falling for you
Stumps
A pear. P.s. got this joke in a cracker. If anybody gets it can you please explain it. My family is stumped.