Do you know of any research that shows that we should be soaping our bodies every day? Personally, I'm skeptical of claims that are based in nothing but consens

Do you know of any research that shows that we should be soaping our bodies every day? Personally, I'm skeptical of claims that are based in nothing but consensus -- like the well-known "fact" that we need 8 cups of water a day, or that we lose most of our heat through our heads.