甚麼是msm

Men who have sex with men (MSM) is a term used mostly in the United States to classify male persons who engage in sex with other males, regardless of whether they self-identify as gay, bisexual, or heterosexual. The term is intended to reference a particular category of people as a risk-group for HIV, and is considered a behavioural category. As this label can only be reliably applied where the sex of individuals is unambiguous, this term should be avoided for transsexuals, transgendered individuals and intersexuals, except in cases where it is clear that they engage in risk behaviors similar, or equivalent to the risk behaviors of unambiguous men having sex with unambiguous men. Since risk factors can and do vary between cultures, the application of this group should also be avoided in cases where this specific risk behavior is no longer a significant category for the contraction of HIV or other STDs.

MSM groups include:

men who self-identify as homosexual, and are sexually active
men who self-identify as bisexual, and are sexually active with men
men who self-identify as heterosexual, but nonetheless have sex with other men, regardless of the percentage of their partners who are male
transgendered, or transsexual individuals, who engage in behavior similar or equivalent to sex between men
men who have sex with men, and whose cultural paradigm may not lead to defining oneself as heterosexual or homosexual as most modern/Western cultures tend to, so long as the risk-factors for this category continue to be significant

甚麼是msm
MSN =MSN Messenger 是係綱上即時和朋友通訊。
and是msn not msm