Abstract
According to Hume, humans, unlike other group-living animals, cannot accommodate their natural sexual appetite naturally; this is a Rawlsian 'circumstance of justice'. Humans have to formulate conventions or artifices to govern their reproductive relations in order to maintain their group or social life. Hume implicitly addresses this issue in his discussion of chastity. The paper explicates his argument. This argument, and its underlying philosophical anthropology, is seen to embody a distinctive approach to a striking feature of the human condition -- sexual relations are universal but not uniform