There is an old American joke about a farmer selling a mule. He says to a prospective buyer that the mule is a very good worker and is very cooperative but you have to treat it gently for best results. When the prospective buyer asks for a demonstration, the farmer walks over to the mule, takes a large stick and swats the mule beside the head. “Wait a minute,” says the buyer. “I thought you said you have to treat it gently to get the best results.” “Of course,” says the farmer, “but first you have to get its attention.”
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