The recent emergence of a range of different behaviors under the rubric "problematic Internet usage" raises the question whether this, too, should be a psychiatric diagnosis (29, 30). Two studies (1, 2) have indicated that the consequences of such use can indeed be far reaching, with many subjects going without sleep, being late for work, ignoring family obligations, and suffering financial and legal consequences. The typical subject in these studies was in his or her low- to mid-30s, had at least some college education, spent about 30 hours per week on "nonessential" Internet use, and had a mood, anxiety, substance use, or personality disorder. Given that the Internet allows rapid access to sexual material and even sexual partners (31), sexual behavior in this context is particularly pertinent (32). It seems reasonable to suggest that a history of Internet behavior be included as part of the standard psychiatric interview. Nevertheless, given that such symptoms may often be understood in terms of existing diagnoses (including hypersexual disorder), there is reason to be cautious of simply making a diagnosis of problematic Internet usage. Consensus on a diagnostic term and criteria for hypersexual behavior would encourage further research that would help us better understand these patients and, it is hoped, provide better care. Although a range of hypotheses have been put forward about the etiology of hypersexual disorder (3, 17), there are relatively few empirical data to support any particular theory. A number of medications have been suggested useful, with much of the focus on SSRIs in particular, but there is a dearth of controlled trials. Similarly, psychotherapy is routinely advocated despite limited research support. Nevertheless, clinicians who specialize in working with hypersexual disorder are optimistic that many patients can be helped with appropriate clinical care (33).