 Some markets in sexual services exploit providers who manifest weak agency (Satz 2010), such as people who are young, homeless, drug addicts, poor, oppressed minorities, migrants, undocumented, and so on. Gerda Lerna argues that to understand how prostitution evolved historically, we need to understand “its relationship to the sexual regulation of all women in archaic states and its relationship to the enslavement of females” (Lerner 1986: 124). Lerner writes