H-E-Double Hockey Sticks
For whatever the reason one says "bless you" (or some other variation) after another person sneezes [link], there are common superstitions associated with sneezes from around the globe [link]. I enjoyed my St. Patty's Day at an Irish pub in Austin, Texas ... which is of no real consequence other than that is how I came to discover why all Americans are going to hell.
You see, Austin is the bearer of many allergens that I reacted to, making my pub experience only slightly less enjoyable due to random fits of sneezing. After a particularly annoy stint, a man leaned over to say, "Bless you." I smiled and said, "Thank you." This man, who I later learned is British, told me that I must not say, "Thank you," or I'll let the devil back inside. I explained that we Americans didn't know that ... and that's why we are going to hell. We have the devil inside.
I told Christie, our managing editor, my newly discovered addition to the common superstitious practice, and now make a game of who is harboring the most devils. Which is it? "Thank You," or no "Thank you"?