Originally published at More radical with age: The personal blog of Rebecca Reilly-Cooper
1. Humans, like the vast majority of species, reproduce sexually. This means that the reproduction of our species is achieved through the fusion of a female gamete with a male gamete to produce a new organism. In normal cases, each organism produced will be unambiguously either female or male, and will produce the appropriate gametes for the purposes of sexual reproduction.
2. The categories of female and male are thus general biological categories that apply to all species that reproduce sexually. Humans are not special in this regard. While the language we use to describe these biological facts, and the values we attach to these facts, will be shaped by culture, the facts themselves exist independently of culture or our social understandings of them. Whether or not we have the language with which to describe it, females will continue to produce large, non-motile gametes (ova), and males will continue to produce small, motile gametes (spermatozoa).
3. Humans, like the majority of species and like all mammals, are sexually dimorphic.