Eli5: if humans run at 37.5 degrees Celsius why do temperatures lower than that feel hotter?

Question

Thinking about this while I sit in 20 degrees heat sweating my ass off. Like shouldn’t anything under 37 degrees feel cold to us?

In: 34

Answer 1

Side note, this is why spacesuits require cooling

In space there’s nowhere for your body heat to go, vaccum being a perfect insulator. Without significant cooling in the suit, your body heat would kill you in just a few minutes