As the males’ sex drive exceeds the females’, the males will and should compete with one another for the possibility of reproducing with as many females as possible (Ehrenfels 1907, 46). For a sexually well-endowed man (“einen sexual vollkräftigen Mann”), it is advisable to have regular, pleasurable intercourse with healthy women or girls (Ehrenfels 1907, 62), leading to polygyny, which is the only “healthy natural sexual life” (Ehrenfels 1907, 13). For Ehrenfels, this would actually present a “solution to virtually all the major problems confronting European societies” (Dickinson 2002, 257) in his time. Thanks to competition and polygyny, only the best males will reproduce and will do so in greater numbers than in a monogamous culture, in which virile selection is absent (Ehrenfels 1907, 11, 30) and where knights and knaves alike rule as lords in their families. Conversely, since monandric women have more children than polyandric ones (Ehrenfels 1907, 14), and men will only want to care for children that they can be sure to have fathered, females should remain monandric and even avoid serial polyandry (Ehrenfels 1907, 12). Besides the biological reasons, another concern for Ehrenfels is the well-being of the children in successive marriages, i.e., serial polyandry, which would destroy the trust among parents and children, as a stepfather and alimony would never be a satisfactory replacement (Ehrenfels 1907, 68).