Charles wrote:

<<Now you may well be "nutrient deprived" if you live mainly on french fries
and coca-cola, and I guess this sort of diet does in fact make you crave
more.>>

 This is exactly what I mean.  It doesn't matter how much one eats, if it
doesn't contain th necessary nutrients the body will communicate its needs
through the expression/sensation of hunger.  After many years of this, these
expressions become bigger and louder by turning into hypoglycemia, type II
diabetes, heart disease, etc.

Siobhan