b'In one of F. Scott Fitzerald\\u2019s funniest short stories, \\u201cHead and Shoulders,\\u201d a certifiable genius falls in love with a showgirl. The plot and moral of the story aren\\u2019t relevant for today\\u2019s email\\u2014though the story is highly recommended\\u2014instead there is a little passage in it that introduces a concept that is worth thinking about:\\u201cI was a \\u2018why child. I wanted to see the wheels go around. My father was a young economics professor at Princeton. He brought me up on the system of answering e...'