For something so deep-seated into the culture, the reasons why we say "bless you" or "God bless you" when someone sneezes are something of a muddled mess with a lot of theories floating around.

(WTAJ) — “Bless you” or “God bless you” is a phrase most Americans say when someone sneezes, but why do we say it and where did it come from? The exact origins of the saying are unclear.