For the past 90 years, sociologists, psychologists, and penologists have been studying inmate-to-inmate prison sexuality. These researchers have made great strides in advancing the study of prison sexuality. Although many may consider the issue to be deviant, prison sex researchers have made positive contributions to the study of one of the most controversial issues in corrections. In this review, the authors seek to provide readers with an understanding of not only what researchers have uncovered about inmate sexual behavior and the dynamics of institutional sex but also how this field of inquiry has developed and evolved. The discussion that follows is divided into four primary sections, male and female inmate consensual homosexual behavior and male and female inmate coerced sexual activity.