This paper reconsiders Mary Wollstonecraft's ideas concerning sex education. Wollstonecraft, who translated and published the German educator Christian Gothilf Salzmann's Elements of Morality in 1790, agreed with his view that the most efficacious method to eradicate the evils of masturbation would be "to speak to children of the organs of generation as freely as we speak of the other parts of the body, and explain to them their noble use which they were designed for." In A Vindication of the Rights of Woman (1792), she demonstrated views equivalent to the (pseudo) scientific knowledge concerning reproduction and masturbation found in sex manuals and medical advice books of her time, emphasizing the importance of teaching about human reproduction through plants based on Lynnaeus' sexual system and familiar small animals. In addition, her ideal school was a coeducational day school rather than a single-sex boarding school to help prevent masturbation, and its curriculum included subjects related to sex education like botany, natural history, and anatomy. What made Wollstonecraft ahead of her time was that she advocated common sex education for both sexes in schools.