It has to do also with this sort of threatened virility.
这与越来越弱男子气概有关。
A Dutchman named Comeille de Pauw announced in a popular work called Recherches Philosophiques sur les Americains that native American males were not only reproductively unimposing, but so lacking in virility that they had milk in their breasts.
有个名叫科梅耶·波夫荷兰人在本名叫《关于美洲人哲学研究》通俗作品中宣称,美洲土著男人不但在繁殖方面给人印象不深,而且“如此缺乏生殖力,他们乳房都流着奶汁”。