A close examination of the literature on homosexuality reveals a long history of definitional crises in which the central consideration has been the maintenance of a belief in homosexuality as a state of being. This paper asks what, if anything, can be considered essential to the homosexual category. To answer this question, various approaches to homosexuality in the literature have been examined: as a general state of being (the person), as a state of desire (sexual orientation), as a form of behavior (sexual acts), and, more recently, as a personal identification (sexual identity). In addition, the interrelationships of these categorizations are explored.