The majority of people in conservative Asian societies like Taiwan do not accept sex between men, so men who have sex with men often face discrimination. Consequently, many MSM do not want to reveal their sexual orientation-which makes it very difficult for health authorities to reach them with their HIV-prevention programmes. NGOs can do so more effectively. From August to October 2008, the CDC sponsored the Light of Friendship Association of Taiwan to carry out rapid HIV-screening services at venues and locations where homosexuals tend to congregate in Taipei, Taichung, and Kaohsiung. In 1992, the Ministry of the Interior included testing for syphilis and HIV as part of the physical examination for those entering the military.