Homophonic short jokes, nasty nasty nasty nasty.

Once upon a time, a man took a counterfeit bill and went to an old woman to buy something. He gave her the counterfeit money and was about to leave when the old woman stopped him and said, "What you have in your hand is counterfeit money!" " ""How do you know it's counterfeit? " "Look! Should we take precautions? You should also beware of a rectangle! You must beware of a round one! I won't say if it's round, but you need the whole cardboard! You still want to buy toilet paper! I won't talk about toilet paper. To prevent, but also to prevent color! You just want all black and white! I won't say it in black and white. You should also cut the edges with scissors after you take precautions! The edge is torn by hand again! Why don't you think I can't recognize this as counterfeit money? "