" Now of all the cosmic problems yet unsolved, not cancer nor the future of poverty are the flustering questions, but these twain: Which is worse, not to wear evening clothes at a party at which you find every one else dressed, or to come in evening clothes to a house where, it proves, they are never worn? And: Which is worse, not to tip when a tip has been expected; or to tip, when the tip is an insult? "

― Sinclair Lewis , Free Air