According to Ehrenfels, women would remain so impressed and overwhelmed by their first sexual experience, that not even the hottest fires of passion will ever consume that memory, and hence they should avoid pre-marital sex to ensure future happiness in married life (Ehrenfels 1907, 65). On the other hand, abstinence is not suitable for men, who should certainly have some previous experience so as to be fully aware of their sexual duties and to avoid becoming hypersensitive to intimate physical contact (Ehrenfels 1907, 69). Nevertheless, the youth should abstain from sex, not just actual but also fantasized, for moral and hygienical reasons until reaching full sexual maturity (Ehrenfels 1907, 61). What Ehrenfels considered “unnatural” sexual activities, such as masturbation and homosexuality, should be avoided and condemned, although they can be tolerated as long as they do not damage anyone’s health (Ehrenfels 1907, 56). Indeed, autoeroticism, when practiced in moderation, does not cause any noticeable harm (Ehrenfels 1907, 61), and both autoeroticism and homosexual relationships among females, being the passive sex, would not be as harmful as among men, and can hence be considered as lighter transgressions (Ehrenfels 1907, 16).