You can love more than one person simultaneously, in different ways. Emotional intimacy is present in many relationships, but not all. The same is true for passion and commitment. According to a team of scientists led by Dr. Helen Fisher at Rutgers, romantic love can be broken down into three categories: lust, attraction, and attachment. Each category is characterized by its own set of hormones stemming from the brain (Table 1). Table 1: Love can be distilled into three categories: lust, attraction, and attachment .