I picked up this book by Donald McCullough, hoping it might list some of the rules of etiquette that have often puzzled me. Things like: do I hug or shake hands with older ladies that I haven't seen in a long time? Am I supposed to walk visitors out to their cars or wave from the porch? How bad is it to forget my sisters' birthdays? And must I always offer people something to drink when they come over? This book did much more than answer those questions. It changed the questions that I ask. When I was about halfway through the book, I took my car to the carwash. My 3-year-old Rose and I stood behind the big panels of glass to watch my CRV slowly drive through the gantlet of spinning wheels and power sprayers. An older man was watching his car go through as well. We chatted for a bit and then I asked him, "Do you usually tip the men who dry your car?" "Yes," he replied. "How much do you tip? I never know what I should give." "Oh, I g