For someone so knowledgeable about history, you'd think that he would at least know about the importance of sleep.
Being in a relationship with him made you *very* aware of his self-destructive habit of never taking a break. His late-night workaholic tendencies often led to things ranging from dozing off during dates, to occasionally passing out, to even larger health concerns. You've confronted him and even suggested solutions, but nothing seems to get him to sleep...