It could be from a combination of factors, which is why this tendancy seems to be different for different people. The main reason might be that one of the first things to get digested are simple sugars and since sugar is the body's preferred source of energy, it burns it up as it enters the blood stream through the stomach lining and that's what makes a person warm.
Another reason is that the digestive process uses lots of energy, and that creates a lot of heat. For the same reason our bodies get warm when we exercise, we also get warm when we digest.
Other reasons would have to include the parasympathetic division of the autonomic nervous system. This system is designed to make us more relaxed to allow our bodies to divert more blood to our digestive system, and that in turn would also help warm us up.
by eating warm meat
One of alcohol's effects is disruption of the body's temperature regulating mechanism.
To get sleepy, you should try drinking some warm milk or eating lettuce,
if its ice it will turn into a liquid.
As time passes, some of the ice melts, and the drinks become less warm.
i normally feel warm after i eat but some people dont this is a question that most people cant answer you proably need to take a survey to be able to find out what people feel after they eat.
by eating alot of food and fatting up to saty warm
By eating, staying warm, having babies ... this is a question in the category of "wolves," eh? Hmmm ... Got it: The people also lived by avoiding the wolves.
they become warm.
yu have to look up on the internet some good warm ups
If your cat is not eating, give him some really smelly cat food--the smellier the better. Warm it up a little before you give it to him. If you take him to your local vet, the vet may have some insight into why your cat is not eating.