It's just so weird. Everyone has a blanket on their bed. If not that, a thick comforter type thing.

You can actually put on more than one shirt too. If it's super cold, you can put on more than one pair of pants. You can put on more than one pair of socks.

If you're strange and your bed doesn't have blankets, you can put clothes over your bed. Most people have 5 to 10 pairs of pants, and a dozen shirts, a few sweaters. Put those on when awake + your winter coat. Put those clothes on the bed when sleeping. Works like a charm.