Neurogastronomy: How the Brain Creates Flavor by Gordon M. Shepard

      Humans have a good sense of smell but it isn't by sniffing like dogs. Our smell is retronasal which happens when breathing out through the nose while chewing and tasting. Smell receptors are on the inside of the nose connecting to the olfactory bulb near the front of the brain. 

     Knowing that, I chew much more thoroughly and get more enjoyment. In fact the pathways followed are similar to those in addiction which makes sense because being motivated to eat seems like a definite survival skill.