Sex education
Sex education, also called sexuality education or sex ed, is instruction about human sexuality — its anatomy, development, relationships, and social meanings — together with the knowledge and skills needed to manage sexual health. It is provided in schools, through public health campaigns, and by parents and caregivers[^c1], and much of it also occurs informally, through conversations with friends, family, religious leaders, or the media[^c2]. Its scope runs from the biology of reproduction through consent, contraception, sexually transmitted infections, gender and sexual diversity, relationships, and digital life, and its stated goals commonly include preventing HIV and other infections and unintended pregnancy, supporting healthy relationships, and enabling informed, autonomous decisions.
Two broad approaches have structured the field since the late twentieth century. Comprehensive sexuality education teaches about all aspects of sexuality, including contraception, consent, and sexual diversity, and is widely supported by health organizations for its effectiveness in improving public health outcomes[^c3]. Abstinence-only until marriage education teaches abstinence outside marriage and typically excludes contraceptive instruction; evidence does not support its effectiveness[^c4]. The contest between these models has shaped funding streams, state mandates, and international HIV programming, and it remains the central axis of political dispute.
The content and delivery of sex education vary widely between and within countries. Programmes may form a full course or a single unit within biology, health, or physical education, and some schools offer none at all. Provision is shaped by national curricula and laws, state and local school boards, funding streams, parental consent and opt-out rules, and the strength of religious and cultural opposition. Debates over age-appropriateness, LGBTQ+ inclusion, and parental rights have become more confrontational in recent years, and in some jurisdictions legislatures have restricted what may be taught.
International organisations treat access to sexuality education as a matter of human rights and public health. UNESCO, WHO, UNFPA, UNAIDS, UNICEF, and UN Women jointly promote comprehensive sexuality education as a necessary core intervention — to prevent HIV among young people and to empower them to recognise and address violence, abuse, and elements of their sexual health and well-being[^c5] — and global status reporting documents both the spread of national policies and the persistent gap between policy and classroom practice. In some countries, however, governments have moved in the opposite direction: the federal government of the United States has taken an aggressive stance against comprehensive sex education in schools[^c6], illustrating how contested the field remains.