Some very intriguing information here:Hunger And Appetite
It's long, three parts, links for subsequent parts are at the end of each page.
I came across that from a post in Jeff's forum on the topic of Eating Between Meals
I think that's some of the most profound reading I've done on this subject. I haven't read any of Dr. F's stuff, but it sounds like his "toxic hunger" is what this article calls "morbid sensations."
As everyone who has had an extensive experience with fasting knows, true hunger is felt in the mouth and throat and is related to the senses of taste and smell. It is indicated by a watering of the mouth for plain food--even for a crust of dry bread. As almost everybody knows from personal experience the gnawing sensation or other sensation that is commonly thought of as hunger usually comes on at meal time, or when the stomach is empty, and subsides after an hour or two, if no food is taken. As we see in thousands of cases of fasting, these morbid sensations subside and completely cease after two or three days of fasting, not to recur after the fast is broken.
For over a hundred years Shew, Graham, Trall, Page, Dewey, Oswald, Haskell, Macfadden, Carrington, Eales, Tilden, Weger, Claunch, Shelton and hundreds of others, who have had extensive experience with fasting, have been calling attention to the fact that hunger is a mouth and throat sensation rather than a stomach sensation, but the professional physiologists have persisted in ignoring their work and their testimony and have accepted popular superstitions about the sensation of hunger and have "confirmed" these by limited experiments on sick men and women. Cannon, Pavlov, Carlson, etc., have all based their conclusions on inadequate data and on experiments that are too short to be conclusive.
Certainly if one is ever hungry, he is so at the conclusion of a long fast. Fasting experts insist that hunger is invariably manifested at the conclusion of a long fast, like thirst, in the mouth and throat. We employ this fact as a complete and satisfactory test of the sensations observed during a fast--it reveals whether it is true hunger or morbid sensations. Never under any circumstances following a fast, is hunger felt in the stomach. Always it is manifested in the mouth and throat and always there is an entire absence of distress or of morbid sensations associated with the stomach.
I'm very interested in learning true hunger. I'm currently not working and spend most of my time at home. I graze throughout the day, sometimes eating every hour or less. It may only be a few bites of potato, but I know I'm more than likely just eating out of boredom.
So, I definitely feel compelled by this article to really examine my own feelings and sensations with respect to food and hunger.