Because they always leave you stumped!
It was leave your keys at the door.
Two test-tickles!
Nevermind, this riddle is too easy.
an Envelope EDIT: My deepest Canadian apologies to those who are calling this a riddle. I always took it as a cheesy joke
You wave!
It was dead.
A pear. P.s. got this joke in a cracker. If anybody gets it can you please explain it. My family is stumped.
OOOOOWWWWLLLL....