Ha!  That's so corny it's funny! :lol: 
Here's one my grandfather told.  It's about Hallowe'en.
There was this boy with a speech impediment gone trick-or-treating one Hallowe'en, and he knocked on a door and when the man came to the door, he said, "Hello there, young man!  What are you supposed to be?"
The boy said, "I'm a birate."
The man asked him, "Oh yeah?  Well, where are your buccaneers?"
The boy snapped, "They're under my buccan hat!  Now gimme my candy!"