Yes! I always wear my socks to bed. Not only because they keep my feet warm when it's cold, but also because otherwise, my feet would let all the heat off...even in summer, that's usually not something I like. It's wierd, I can wake up, be sweating like a faucet but still feel like someone has frozen my feet into a block of ice. >_>
So yeah, socks are my best friend, especially in winter. n.n
Especially since I tend to wear calf high socks in the winter time, which are kept pulled up as high as they can go