Dlee, I agree. Another theory is that yeast somehow creates the addiction by giving you "feel good" chemicals when you feed it (opiates..pretty much as you describe really).
Yeh I get those dreams. I actually ate a little bit of a potato chip a few weeks back just out of curiosity. Didn't taste like anything special now - just filler. It's only if I walk by a pizza joint that I might really want to eat starch, but really that is more about all the meat, cheese, spice and tomato mmmmm