I'm usually amused by how fandom does in fact sexualize most forms of relationships between people, and yet still somehow manages to stigmatize or disaprover of casual sex. Almost every "fling" I've seen in fic is either a prelude to a romantic relationship, an unhealthy affair that causes relationship angst, or some other type of "mistake". For all the highly politicized sex that you see in fic these days, it still somehow comes out as prudish.'