Why Don’t Humans Have Penis Bones?

The video explores the concept of penis bones, known as bacula, which are present in many mammals but not in humans. It discusses the diversity of bacula in size and shape, their potential roles in reproduction, and the evolutionary reasons behind their presence or absence. The prolonged intromission hypothesis suggests that bacula support longer mating times, which may prevent females from mating with other males. The video also touches on the evolutionary history of bacula and how human monogamy may have led to their loss, with humans developing other adaptations for reproduction.

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