We totally get the drive to understand human behavior. For instance, why does your roommate consistently eat all of your Nutella? Can't she buy her own? Well, maybe not if she studies sociology. 

The major boasts a miserable 3.45% average return on investment (ROI) over twenty years (source). 

Long story short: be nice and share your delicious hazelnut spread with her, because it could be her last tasty snack before debtor's prison.