Erotomania, also known as de Clérambault's Syndrome, named after French psychiatrist Gaëtan Gatian de Clérambault, is listed in the DSM-5 as a subtype of a delusional disorder. It is a relatively uncommon paranoid condition that is characterized by an individual's delusions of another person being infatuated with them. This disorder is most often seen (though not exclusively) in female patients who are shy, dependent, and sexually inexperienced. The object of the delusion is typically a male who is unattainable due to high social or financial status, marriage, or lack of interest. The object of obsession may also be imaginary, deceased, or someone the patient has never met. Delusions of reference are common, as the erotomanic individual often perceives that they are being sent messages from the secret admirer through innocuous events such as seeing license plates from specific states, but has no proof. Commonly, the onset of erotomania is sudden, and the course is chronic.