The most surprising thing about the fact that 75 percent of people wash from top to bottom is that this means that 25 percent of people DO NOT wash from top to bottom. Where do they begin? Do they start at the bottom and work their way up to the top, ending with a dirty rag washing their face and neck? Do they start somewhere in the middle and just hope for the best from there? Whatever the case may be, at least three-quarters of the world population start at their head in the shower.