I know bad foods make people warmer, yet when fasting, a person can easily cut up the ice on a pond and go swimming and i doubt the meat eater would find that a very pleasant thing to do.
Cold, food, etc....is a complicated subject....
My feet are cold feeling, yet they are not cold to me. When healthy, cold weather doesn't bother a person near as much as when they are sickly...very sickly people seek warmth.