men who have sex with men. They may or may not identify as homosexual or bisexual.
Men Seeking Men
see MEN WHO HAVE SEX WITH MEN.
Men who have Sex with Men. Describes males who desire or engage in same sex behaviors and who may or may not identify as gay or bisexual.
Men who have sex with men. They may self-identify as heterosexual, gay, or bisexual. MSM can be involved in heterosexual relationships.
Men having Sex with Men
Men Who Have Sex with Men; a term created to include those who do not identify as gay or bisexual.