Since the first report of AIDS in 5 men who have sex with men (MSM) from Los Angeles,1 MSM have accounted for a higher proportion of AIDS cases than any other group in countries such as the United States (44%), Canada (65%), and Australia (64%).2-4 Although MSM first brought human immunodeficiency virus (HIV)/AIDS to the world's attention and, even in the absence of external funding, were the first to promote risk reduction strategies, prevention efforts for MSM appear to have faltered.