On top of all the other explanations is that deeper realization that can bend your mind a little. Space isn't hot or cold, it is a void outside of that definition. In the same way you cannot see out the back of your head and that you are not aware of there being a deficiency of sight in that direction. It's a non-event.

Also when it comes to heat radiations, on the right wave length we are all glowing all the time. That's now heat vision works. Very neat to think about.