You get too "soft" living in conditions like that! That way, you don't appreciate how good frostbit fingers feel as they are thawing out, and keeping time to the music with your knees knocking together! Hell, when was the last time you didn't even know your feet were there for a couple of hours???
Besides, it makes for a good "excuse" for the occasional belt of "anti freeze"! That way, the WCTU doesn't yell too much!