Karen Messing is talking with women who wire circuit boards, sew clothes, clean toilets, drive forklifts, care for children, serve food, run labs. What she finds is a workforce in harm’s way, choked into silence, whose physical and mental health invariably comes in second place: underestimated, underrepresented, understudied, underpaid. Should workplaces treat all bodies the same? With confidence, empathy, and humour, Messing navigates the minefield that is naming sex and biology on the job.