As I read more and more about Grenouille, I am more interested in the relationship between his apparent psychological problems and smell. I looked for an article that may have explained this and interestingly enough, I found an article (http://psychcentral.com/news/2012/09/21/psychopathy-linked-to-impaired-sense-of-smell-frontal-lobe/44949.html) written in 2012 that suggests that psychopathic tendencies are connected with lack of olfactory senses that come from the frontal lobe of the brain. Unfortunately, that did not relate well to our story because Grenouille is obviously impacted heavily from his sense of smell.
So I looked in to smell and psychological conditions deeper and found from several articles that support that smell and deep emotion are very closely associated. In fact, The Smell Report (http://www.sirc.org/publik/smell_emotion.html), suggests “Our olfactory receptors are directly connected to the limbic system, the most ancient and primitive part of the brain, which is thought to be the seat of emotion.” Grenouille’s actions, as horrible and revolting as they are, seem to be driven by passion. I believe that his heightened sense of smell may be a direct cause of the senseless and passionate drive that allows him to commit murder.