> Everybody's body is different. I'm normally very resistant to cold, esp, if I'm moving, yet I cool down when I don't move, and esp. at nights (when body slows down even more), so I need a warmer environment (~20 degrees C) to live comfortably at nights.

You're describing something that is true of every human on Earth. Everyone gets cold when they don't move. Everyone's body cools down at night. You don't need 20C to sleep at night.