Sexual violence against men is an under-theorised and under-noticed topic, though it is becoming increasingly apparent that this form of violence is widespread. Yet despite emerging evidence documenting its incidence, especially in conflict and post-conflict zones, efforts to understand its causes and develop strategies to reduce it are hampered by a dearth of theoretical engagement. One of the reasons that might explain its empirical invisibility and theoretical vacuity is its complicated relationship with sexual violence against women. The latter is evident empirically, theoretically, and politically, but the relationship between these violences conjures a range of complex and controversial questions about the ways they might be different, and why and how these differences matter. It is the case that sexual violence (when noticed at all) has historically been understood to happen largely, if not only, to women, allegedly because of their gender and their ensuing place in gender orders. This begs important questions regarding the impact of increasing knowledge about sexual violence against men, including the impact on resources, on understandings about, and experiences of masculinity, and whether the idea and practice of gender hierarchy is outdated. This book engages this diverse set of questions and offers fresh analysis on the incidences of sexual violence against men using both new and existing data. Additionally, the authors pay close attention to some of the controversial debates in the context of sexual violence against men, revisiting and asking new questions about the vexed issue of masculinities and related theories of gender hierarchy. The book will be of great interest to students and scholars of sex, gender, masculinities, corporeality, violence, and global politics, as well as to practitioners and activists.