It’s no secret that smells affect the way we feel. Have you ever wondered why some smells make us feel peaceful while others make us feel energized? It all comes down to what chemicals those smells are composed of, which determine the way our brains respond to them. There's science behind this as well. It turns out scents send signals to our limbic system, which is the sector of the brain that controls memory and emotion. We are wired to respond to certain smells in certain ways because of the memories we associate with them, whether good or bad.
Just think about the last time you got a whiff of something awful—like, say, a trash can that’s been sitting out in the sun too long—and how it made you feel instantly nauseated. Or how about when you walked into your parents’ house after school and smelled your favorite dinner cooking? You probably felt instantly comforted and relieved.