Deleuze and Guattari: "The first organ to suffer privatization, removal from the social field, was the anus. It was the anus that offered itself as a model for privatization, at the same time that money came to express the flows' new state of abstraction" (qt'd by Preciado, 71)
Preciado riffs (also 71): "The anus as a center of production of pleasure (and, in this sense, closely related to the mouth or hand, which are also organs strongly controlled by the sexopolitical campaign against masturbation and homosexuality in the nineteenth century) has no gender. Neither male nor female, it creates a short circuit in the division of the sexes. As a center of primordial passivity and a perfect locale for the abject, positoned close to waste and shit, it serves as the universal black hole into which rush genders, sexes, identities, and capital"