There do exist irregular sets of chromosomes and irregular genitalia, but there is no gamete other than eggs and sperm, so such irregularities do not serve any kind of nonbinary reproductive function.
This is important to clarify because the genderqueer brigade will always bring up intersex ppl and XXYs and whatnot, but a proper understanding of biological sex blows all that shit up.
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@ArdanianRight They will also ignore the fact that intersex genitals are usually non-functional.
@xianc78 Either that or only so slightly irregular as to be functionally identical to normal ones.
