A lot of men have sex with other men but don’t identify as gay or bisexual. A subset of these men who have sex with men, or MSM, live lives that are, in all respects other than their occasional homosexual encounters, quite straight and traditionally masculine — they have wives and families, they embrace various masculine norms, and so on.
They are able to, in effect, compartmentalize an aspect of their sex lives in a way that prevents it from blurring into or complicating their more public identities. Sociologists are quite interested in this phenomenon because it can tell us a lot about how humans interpret thorny questions of identity and sexual desire and cultural expectations.(keep reading)