Once a man knocked on a door and an old lady opened the door.

Without a word, the man went in took a lot of cow dung from his bag, and threw on the carpet.

“You see, I have a wonder vacuum cleaner with me here, if this doesn’t work I’ll eat every piece of that dung,” he said.

“Do you want tomato ketchup with it? ” The lady asked. “Cause you see, we still don’t have electricity in this house”