[He frowns, clearly missing the important point here, which prompts him to ask, rather confused:]
So, what, you don't-- you know. Drink blood? Like, actual blood? [Oh god, is asking this a faux pas? Is he being super impolite? BUT HE WANTS TO KNOW.]
Because if your tablets are missing, I mean, it might be just me, but... isn't that kind of the obvious choice?