Abstinence-only sexuality education is an approach to sex education that emphasizes abstaining from sexual activity until marriage. Proponents argue that it is the most effective way to prevent unintended pregnancies and sexually transmitted infections (STIs). However, critics argue that it is ineffective, unrealistic, and can even be harmful by withholding comprehensive information about contraception and safe sex practices. The effectiveness of abstinence-only education remains a subject of debate, with studies showing mixed results.