In a convincing descriptive model of PIU, Pratarelli, Browne, and Johnson (1999) described a four-factor model of PIU psychopathology. Factor one focused on the dysfunctional behaviors associated with overuse of the Internet, as outlined by several problematic behavioral styles. Factor two described the functional use of the Internet, which includes using the Internet in a meaningful and productive way. Factor three focused on using the Internet for sexual gratification and/or social gains. This describes the shy or introverted user who relies on the Internet to express his/her fantasies. Finally, factor four describes those individuals who are either disinterested in the Internet or mildly averted to the technology. They demonstrate little or no dependence on the internet (Pratarelli et al., 1999). This model attempts to describe four levels of Internet users. Therefore, for any given user, we can assign a category of Internet usage. While this model is helpful in describing the prevalence and incidence of Internet usage, it does not address the etiology of PIU.