Sex education provides instruction on issues relating to human sexuality including relationships, sexual anatomy, activity, reproduction, consent, health, rights, and birth control. It aims to provide comprehensive information to help people make informed decisions. Evidence shows that comprehensive sex education that includes contraception information can reduce unintended pregnancies and STIs when combined with access to birth control, while abstinence-only education may increase risks. Sources of sex education include informal conversations, as well as planned instruction in schools or from health organizations.