Why does it have no basis in reality? Are you arguing that a middle class white woman would never prostitute herself for a lower class black man?I know what those terms mean, it's just that the hypothetical has no basis in reality and I won't answer it.
Edit: if we're going to talk about how things should be (which I think is a good characterization of the discussion in this thread), then you're going to need to be able to compare contrafactual scenarios (i.e. hypotheticals that "have no basis in reality") with the status quo.