I agree with a lot of what you have posted this evening.
But this needs further clarification.
What do you mean when you say there are more than two biological sexes.
Gametes (egg/sperm) cannot be used to create a sex binary in humans, because no gametes can be present along with ambiguous gonadal tissue.
This third “undefined” possibility eliminates the possibility for a binary sex classification in humans.
Gametes are only one of multiple sex markers that in aggregate constitute a person’s sex as female, male, or a blend of both (intersex/undefined).
Other critical sex markers beyond gametes include but are not limited to gonads, genitals, chromosomes, sex hormones, and secondary characteristics.
No sex marker, including gametes, present as a sex binary.
On *average*, females *tend* to have XX chromosomes and males *tend* to have XY chromosomes.
But those are not the only options, the situation is absolutely not a binary male or female.
In humans, the following sex chromosome variations are naturally occurring:
45, X, also called Turner syndrome
45,X/46, also called XY mosaicism
46, XX/XY
47, XXX, also called Trisomy X
47, XXY, also called Klinefelter syndrome
47, XYY with normal phenotype
48, XXXX
48, XXXY
48, XXYY
49, XXXXY
49, XXXXX
XX Male Syndrome
XX Gonadal Dysgenesis
XY Gonadal Dysgenesis