What is it about snow falling

What is it about snow falling that saps me of the will to do anything non-hibernatory?  I wonder: if I'd just closed the curtains, could I have actually gotten myself together and accomplished something (other than reading The Name of the Wind, dishes, and cleaning), such as completing my tax research and submitting my taxes?  The world may never know because I was entranced by the sight of all that falling snow out of the corner of my eye as I sat on my tiny couch in my tiny room reading a large book of grand, epic adventures.  Except for the cleaning and dishes, it was pretty much perfect.