An enthusiastic door-to-door vacuum salesman goes to the first
 house in his new territory.
 
 He knocks, a real mean and tough looking lady opens the door, and
 before she has a chance to say anything, he runs inside and dumps
 cow patties all over the carpet.
 
 He says, "Lady, if this vacuum cleaner doesn't do wonders cleaning
 this up, I'll eat every chunk of it." 
 
 She turns to him with a smirk and says, "You want ketchup on
 that?" 
 
 The salesman says, "Why do you ask?" 
 
 She says, "We just moved in and we haven't got the electricity
 turned on yet."