Last time I IFed I found hunger to become a more varied signal and something much more under conscious control.

Some hungers turn out not to be that urgent.

There's a different hunger for an empty stomach and for a suddenly drop in blood sugar, etc.

I mean different body signals tell you that you are hungry and you learn to introspect them a bit.

I had quite a bit of fun trying to get to biochemical/physiological/phycological understanding of the triggers/sensations.

The one I could never quite crack is a craving to chew when I could tell my stomach was full and I was satiated otherwise.