By Anne Mireille Nzouankeu YAOUNDE (Thomson Reuters Foundation) - Sitting in a circle with several other young men in a charity's offices in Cameroon's capital, Fleur listens intently to the speaker talk about gay sex before slowly raising his hand. "Can we catch AIDS by swallowing sperm?" he asks, prompting laughter from his peers at the group discussion held by Alcondoms, an organization promoting the rights and health of lesbian, gay, bisexual and transgender (LGBT) people. Cameroon has the second highest HIV prevalence rate in West and Central Africa, after Nigeria, and men who have sex with men are hit the hardest, says the U.N. AIDS program (UNAIDS).