Bernard Williams famously distinguishes "thin" from "thick" ethical concepts (Williams 1985, pp.140-142, 150-152). Examples of the former include the concepts of goodness, badness, rightness, wrongness, and obligatoriness. Examples of the latter include not just nice concepts like justice, fairness, and kindness, but also nasty concepts like chastity, slutiness, and poofiness. The nature and si...