This is a metaphorical essay on personal ethics, worthy of a serious read and contemplation. When I saw the title I was intrigued but suspected it had something to do with Andy Grove’s adage, “sewage flows downhill,” which means “if anything bad happens it will eventually flow down to you.” This is about ethics. The points made here are particularly apt in light of the huge number and sheer scale of recent business frauds: the Volkswagen fraud, LIBOR, Lehman Brothers, Bernie Madoff’s pyramid scheme, Conrad Black in Canada, Olympus in Japan, Bernie Ebbers and Worldcom, Tyco International, stretching back all the way to Enron, Michael Milken’s junk bonds, and the 1980’s savings & loan debacle.