I have a great solution... more sex!
sex keeps you warm...
Then again, there was that line from the "You know you're canadian when:" list that I had, I forget exactly the wording, but it followed the line that you "think sexy lingerie is long johns, tube socks, and a sweater"
gotta live in your hot&chillys and spend a lot of time cuddling, if it works for hypothermics, it'll work for you
good luck