Here is JB from footnote #6 page 151, Gender Trouble 1990. Routledge
I use the term heterosexual matrix throughout the text to designate that grid of cultural intelligibility through which bodies, genders, and desires are naturalized. I am drawing from Monique Wittig’s notion of the “heterosexual contract” and, to a lesser extent, on Adrienne Rich’s notion of “compulsory heterosexuality” to characterize a hegemonic discursive/epistemic model of gender intelligibility that assumes that for bodies to cohere and make sense there must be a stable sex expressed through a stable gender (masculine expresses male, feminine expresses female) that is oppositionally and hierarchically defined through the compulsory practice of heterosexuality.