Nose hair is on a list of things we avoid mentioning in polite society. Most people think of it as an unneeded relic of our ancestory or as a defect in the design of our bodies. Medical people may tell us that hair in the nose protects us against environmental threats such as germs, fungus, and spores. But appearance usually trumps health concerns. The celebrities whose appearance we admire and emulate do not have nose hair showing.