This, is I guess, a slightly bizarre communication. I have noticed that while I’m falling asleep and if the air in the room is still I can feel the induced draft of cool air on my face caused by exhaling breath.
When I breathe out of my mouth and my head is facing horizontally the air I breathe out “pulls” air surrounding my head along with it and that gap is filled with air which causes a slight cooling effect on my cheeks.
This tour-de-force of a diagram shows what I mean. My outgoing breath A induces a current of air over my cheek B causing the cheek to cool a little. For this effect to be felt I think the bedroom air needs to be reasonably still and not too warm.