Abstract
This chapter provides an account of sexual ontology, grounded in and responsive to Irigaray’s philosophy, that focuses on the question of possibility. I first consider possibility in terms of the ontological negativity of sexuate beings, whereby one sex or sexuate morphology does not exhaust all that that kind of being is or can be. Second, I consider how sexual difference, as a relational structure of being, engenders possibilities for sexuate beings to develop as irreducible individuals. With particular focus on the human being and the looming question of transhumanist technologies, I argue that these principles develop a sexual ontology that recognizes determinate limits between sexes while allowing for varied and creative expressions of sexuate life.