Male to male unprotected anal sex is the main route of HIV transmission in Australia. The Australian Study of Health and Relationships, a large, representative population survey of sexual health behaviors, found that six percent of males in the general population have engaged in homosexual activity. These findings were consistent with studies in Europeand North America. Condoms have been shown to reduce the transmission of HIV in the community. Barriers to the use of condoms include access,stigma,and cost? Nevertheless, increased condom use has been reported among homosexual males, sex workers and injecting drug users although recent declines in condom use among homosexuals has presented new challenges in HIV prevention.The prevalence of male to male sexual activity may be higher in prison than in the general population. Sexual activity in prison can be consensual and non-consensual involving both homosexual / bisexual and heterosexual men.