This article considers what we owe to each other by way of information disclosure prior to sexual intimacy. It does so in one specific context, namely sexual relations between cisgender and transgender people. In recent years, the UK has witnessed a spate of sexual offence prosecutions brought against young transgender and other gender non-conforming people. The article does not deal with questions of criminal law, at least not directly. Rather, it aims to challenge the dominant cisnormative view that non-disclosure of (trans)gender history is unethical. The article contains four parts. First, it will issue an important caveat concerning complainant claims of ignorance of defendant gender identity. This is important because without the cave...