The psychological effects of food on your mind and how big business exploits them

In my research paper, I talk about the psychology of food and how businesses exploit our psychological tendencies when it comes to food. Most people don't know why smelling their favorite food really makes them hungry they just assume that's the way it is supposed to be. When you smell your favorite food the brain increases in metabolism which fires neurons to the Hypothalamus which is the part of the brain that makes you hungry. Businesses understand this and they often leave doors and windows open when they are cooking so that consumers walking by unknowingly walk right into this psychological trap and we spend money when we might not have if we didn't smell the food. One would do well to watch themselves so that we don't fall for many of the business tricks that are used today.