Why do golfers yell "fore"? nbsp; Is it ever acceptable for a man to use a purple golf ball? nbsp; If my boss invites me to play golf, should I let him win? nbsp; Since 2002, readers of Golf Digest have submitted their most puzzling and perplexing golf questions to the Golf Guru, a.k.a. John Barton, whose monthly column answers these imponderables with authority and good humor. This illustrated golfer's miscellany compiles more than 250 of his most compelling Q&As, tackling everything from history and physics to fashion, etiquette, and beyond. Why do golf courses have 18 holes? How much is a membership at Augusta National? Is golf really an acronym for "Gentlemen Only, Ladies Forbidden"? Whatever the question, the Golf Guru has the answer!