"Most of Tennov's research came from thousands of personal accounts of those who had fallen in love. She discovered that many who considered themselves "madly in love" had similar descriptions of their emotions and actions. She chose the label limerence to describe an intense longing and desire for another person that is much stronger than a simple infatuation, but not the same as a long-lived love that could last a life-time. Limerence is often overpowering, and in intense cases will cause a person to be obsessed with the one they've fallen for."