You may be right. I think for a conscious person, it would depend a great deal on who's providing the warm air. Such notions cojure memories of the Jim Carey/Lauren Holly fantasy kissing scene from "Dumb and Dumber" (yecccchhhh!!!!)

I know it would be a real challenge to offer assisted respiration to some of my old hunting buddies, especially if they were hypothermic yet still cohesive. I reckon I'd have to knock them cold with the frying pan first so's they wouldn't struggle so much.