Okay, see... the thing about JOKES? You're not really supposed to research them, because that kinda drains all the funny. Chickens very rarely cross the road unless found in undeveloped countries, a knock at the door isn't usually followed by a series of questions and answers unless you happen to be a shut-in paranoid, and Henny Youngman would actually be quite upset if somebody were to abduct his wife despite his repeated requests that somebody take her.