主题：【原创】飞天鸭看人类文明史：原始社会好（中） -- 酥油茶

Concealed ovulation may have evolved because it promoted the paternal tendencies of the less polygynous males who advanced female reproductive success the most. Since the offspring of indulgent males would have a competitive advantage over the offspring of more polygynous males, and females revealing the time of ovulation would become increasingly scarse, all males would eventually pursue a reproductive strategy emphasizing paternal effort over mating effort