When we were kids my brother, Eightball, who was then probably 5 years old, was playing in the mud with a similarly aged boy, the nephew of one of our neighbors. He had the exact same shade of brown hair as our neighbor did; probably the whole family had the same shade of hair. Eventually they spoke to one another - Eightball could go for a long time without speaking, often, but perhaps some disagreement came up as to what would be built in a particular area - and the other little boy looked at him and said, "What are you? You're not a person. People have brown hair." (I don't suppose Eightball bothered to answer that.)
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