men who engage in sexual behavior with other men, but do not necessarily identify as "gay," “homosexual” or "bisexual."
(MSM): A term used to denote men who engage in sexual behavior with other men; includes men who self-identify as heterosexual as well as those who self-identify as gay and bisexual (please note that in online politics, MSM is an acronym for mainstream media)
Terms is often used when discussing sexual behavior. Is inclusive of all men who participate in this behavior regardless of how they identify their sexual orientation. The acronym MSM is conventionally used in medical literature. Also used: Women who have Sex with Women (WSW).