A little old lady answers a knock at her door, there a well dressed young man carrying a vacuum cleaner greets her. " Good morning," he says, "if i can have two minutes of your time, I shall demonstrate the latest in high power suction."
"Bugger off," replies the old lady, moving to slam the door shut, "I haven't any money!"
"Quick as a flash, the salesman puts his foot in and pushes the door open. "Now don't be to hasty madam," he pleads, "at least see my demonstration!" And with that he empties a bucket of manure all over the carpet. "If this vacuum cleaner does not remove all traces of this muck from your carpet, i'll eat the remainder."
"Then i hope you got a bloody good appetite," replies the woman, "the electricity was cut off this morning."