Now the logical thing to do would be to ask the fiance med student, but he's at anatomy lab right now, and by the time he comes home I'll be cooking dinner and have forgotten. I skipped around the interwebz to try and find a somewhat plausible answer but find nothing satisfactory. One person, on MetaFilter posited that it is because people normally breathe through their nose. Nope, try again. I read all sorts of reasons, though normally not what I would call trustworthy, that were not the common ones of cold or allergy symptoms. Pressure, perhaps from leaning forward while spitting, increased saliva production, or maybe it's because I'm, unbeknowst to me, allergic to something in our toothpaste?
Oh, well. At least I tried to learn a possible reason why! Here's something that is way more fun than runny noses or tax returns, enjoy!
Southeastern Guide Dogs PuppyCam. Awwrrr.