This article explores ethico/political/ontological orientations made possible by an exploration of sex/gender and sexuality. Drawing from materialist theorists such as Karen Barad, Gilles Deleuze, and Felix Guattari, we employ the concept of assemblages to tease out the reality that our shared world is always already in a state of queer becoming. We employ Deleuze and Guattari's concept of assemblages in the form of diagrams to illustrate that sex/gender and sexuality are phenomena that emerge from complex material and discursive entities--which are simultaneously biological/cultural, individual/collective, non-human/human. The implication of this article for environmental education is twofold: (1) Sex/gender and sexuality can be central to understanding how materialist and ontological considerations are vital to a politically engaged environmental education and (2) diagramming assemblages can help students and teachers map and imagine potential becomings, areas for critical engagement and political action, and new ecologically and socially just futures.