Guillaume's Mailbag: Why do we close our eyes when we sneeze?

So, as always, these full-page ones are hard to read on the blog. For a better image, go here.

Best URL for sharing: http://www.darwineatscake.com/?id=42
Permanent image URL for hotlinking or embedding: http://www.darwineatscake.com/img/comic/42.jpg

Thanks to Willemien Kets and Elais Kadeem Player, a.k.a. crashgroove for their excellent questions.