Every American citizen becomes aware of reproductive topics at some point, most likely during adolescence. This is a simple statement, but when examined further, one realizes that although everyone has this fact in common, how and what one learns varies. Sex education in the United States has been a contentious topic, and has not experienced linear progress. Whether it be the appropriate age to learn about sex and bodily changes, whether or not sex-education has a place in public school curriculum, and what schools are allowed to teach are all points of debate surrounding sex-ed. Influenced by gender roles, state and federal governments, the HIV/AIDS epidemic, and religion – particularly Christianity – the U.S. has experienced many different phases of sex education. By analyzing sex education resources from different time periods, data on teen pregnancies and sexually transmitted diseases (STDs), and scholarly essays on consequences of different curricula, it becomes evident the most effective sex education leads to a better understanding of relationships, sexuality, and the human body. This form of education is known as “comprehensive sex education” and is generally more progressive and developed, since its curriculum covers the importance of contraception and consent – and does not rely on an abstinence-only curriculum. What children and teenagers learn is extremely important because it not only affects their sexual health, but also their views of their sexuality and role in society.