The Sexual Offences Act 2003 set out a new public sexual ethic. This article considers how its three ‘big ideas’ – consent, equality and protection – compare with the values that underlie sexual offences in biblical law. First, we find that consent in biblical law is not merely a matter for the actors involved in the sexual behaviour, but goes wider to include others who are affected. Second, whereas modern law identifies certain classes as morally indistinguishable and therefore ‘equal’ (e.g. making no distinction between heterosexual and homosexual intercourse), biblical law builds its idea about equality on a different set of moral distinctions. And, third, whilst modern law properly focuses on protecting children and other vulnerable persons, biblical law goes much further to consider the protection of the family and society as a whole. In addition, biblical law knows of further categories within which to structure sexual offences, including a concern for order and the good of the Creator’s original intent.