Walking into a bathroom is a crapshoot. You either get cold crisp air, or you have your nose hairs singed off.
No pun intended
Fun fact: walking into a bathroom is literally a crap shoot.
Why cold air..?
Most bathrooms (at least in offices) have dedicated supplies and returns and it’s usually has a pressure differential to suck the smell out. At least that’s how most in the US are. I’ve seen it vary around the world.