Literate programming systems are a class of domain specific languages designed to encourage writing programs specifically to be read as essays or books by humans instead of by machines. Systems like CWEB, WEB, and ChezWEB allow the user to associate arbitrary code bodies with a concise but natural language description. That description may then be referred to in other sections of the program source, and the code body associated with the description is substituted for the reference in the program source. ChezWEB implements code reordering according to a specific set of “hygienic” principles. This talk describes what these principles are and why they make sense for literate programming. Additionally, I will explore the implementation of these principles in the syntax-case system through a series of macros designed to test and strengthen your understanding of macros and hygiene; bring your macro hats!