They're the ones with stretch marks on their lips.
3, duh. (My ex's 9 year old little sister told me this joke, and followed is up with: "and YOU'RE the math guy!" >< Burned.)
He said Nein My dads jokes are the wurst I tell you.
The ones in the mail of course!
Ones a snack cracker and ones a crack snacker!
You just put your lips together and whistle
Tulips
They hog the Schwing set.
A pitbull returning from a playground.
They're the ones with stretch marks around their lips.