Feministe pointed out this post about Brain Sex theories and the way that "trans activists" (but really, talking about Twue Twanssexuals!) use those theories.
Feministe describes it as a "thoughtful post" and suggests that the author is a paragon of discussing the issue in the blog comments.
I don't know what, precisely, is triggering me but there's something about the post that completely sets my teeth on edge. Usually I like stuff that's critical of Brainsex-like theories; this post, not so much.
Maybe it's the throwaway comments like, "The term cis privilege is used to silence all critiques of brain sex activism." Riiight.