We don't always give our sense of smell the credit it’s due. Yes, it lets us know when cookies are baking or the coffee is brewing, but it also alerts us to gas leaks, smoke, and spoiled milk. Smell’s direct line to the limbic system means that it plays a huge role in mood, memory and emotion. Have you ever smelled something and immediately flashed back to childhood? Believe it or not, scent marketing (aka sensory branding) is actually a thing. The perfume industry, Starbucks, Burger King, movie theaters, the water in the Pirates of the Caribbean ride… all of these benefit from our strong emotional connection to smell.