If we’re going to sanction criminals with loss of their liberty, then we had better have a justification for doing so. A plausible justification centers on the claim that they have committed offences that are proportionately objectionable from a moral point of view. Take that idea seriously, and the philosophy of the criminal law becomes intertwined with moral philosophy. A clear example is the topic of sexual offences. On the assumption that the moral depravity of these offences is part of the justification for punishing those who commit them, philosophers of the criminal law should be interested in the question of what makes sexual misconduct morally wrong. A popular liberal approach to answering this question focuses on consent. Roughly...