MSM: a behavioral category commonly used in public health, created in the 1990s, describing men and male persons who engage in sexual activity with other men/male people, regardless of how they identify themselves.

Just as MLM, many people reclaim MSM without necessarily embracing manhood/maleness, such as Wolffian/DMAB sex workers and non-binary transfems/transgynes.

This flag is about actions, not attractions or orientations, so this includes straight MSM as well as other non-straight MSMs (gay, aspec, mspec/bi+…) and questioning/undefined/unlabeled MSM (any MSM comfortable with it). -Ap