The first time a casually racist reference crops up in the Victorian texts I teach, I tell my students that the presence of slurs and stereotypes in Victorian literature reflects the prevalence of racism in Victorian society. I give them some historical context for the racism whenever possible and smile stoically. Yes, I say, that expression in the novel I've made you purchase and that I'm encouraging you to find fascinating is indeed racist. Let's talk about how racist it is and why! The second time an explicitly racist reference crops up, we refer to the previous conversation. The third time it does, we look meaningfully at each other and shake our heads. The fourth time it does, we don't even mention it. We learn, like the Victorians, to take it for granted.