Bullshit. If you wish to claim otherwise, please bring forth your human who produces a third type of gamete. I'll even settle for a human that produces a sperg.
... though it would explain that virgin Mary story...
Then please, go ahead and present your exception to humans only being able to produce two distinct types of gametes, and having reproductive anatomy arranged around the production of one or the other - and never both - of those gametes.
Because disingenuous arguers will inevitably make the childish claim that using gametes as a reference means that menopausal women are no longer female. Because dummies do dumb things.
A single human being cannot have both a female-typical uterus, fallopian tubes, and vagina AND ALSO have a male-typical penis and testes.
Behavior and identity are 100% irrelevant to our physical bodies. With perhaps a small exception for innate behavioral tendencies that have a basis in either inherited instinct or evolutionarily developed behaviors.
You're right - biology doesn't cater to whims and wishes. It simply is. And what it IS results in a strict sex binary among all mammals. That there are some cases where development goes awry does not in any fashion make sex NOT binary. Reproduction among mammals is evolutionarily dependent on that sex binary. You exist because of that sex binary. It does not, and cannot work any other way.
Actshooally... You might want to think about this some. You know who drives and monitors GENDER binary divisions? Because it's not women. Women have been accepting of gender non-conforming women time out of mind, and women have always been more tolerant of gender non-conforming men than men are.
No, we fucking cannot. Humans CANNOT change sex. It is not a thing. And don't go getting all semantical on us and start replacing literal language with figurative language, because you know goddamned good and well that a person who undergoes a figuratively-named sex change operation has not ACTUALLY changed sex.
Applying exogenous hormones does NOT change ones sex. No amount of hormones will allow a male to produce eggs, nor to become pregnant, nor to gestate a fetus. No amount of testosterone is going to result in a female having a raging hard-on or a night-time ejaculation.
Biological sex is not defined by karyotype! We've been through this already.
Oh, please, do educate us. What are these seven gametes that can be found in humans? Or how about just mammals - I'll give you the entire class of mammals so you can show me these seven gametes. Go on. I'll wait.
Um... no. Neither of those can change sexes.
It's more likely she lied to avoid getting stoned to death, if she was ever real at all.
Unfortunately, there's a higher likelihood that Mary had her hymen intact, and got knocked up from Joseph (or someone else) ejaculating on her labia. Because that actually can happen.
academic.oup.com
Drag performers don't change sex, they change clothes.
Correct.
Eventually many trans individuals go on to change a great deal more than clothing. Including legal identity.
That is correct. Which is why the language has shifted to refer to "Trans-identified people" more correctly as transgendered rather than transexual as was once common when we knew less. Welcome to the twenty-first century of the Common Era, Metaphor. What you are slowly and inconsistently discovering - that cultural interpretation and portrayals of sex characteristics differ from what an objective scientist can observe of chromosomal sex - has been well known to the scientific community for well over a century now. Which is why we have now adopted the convention of differentiating between "sex" and "gender" in English.
Politesse, I cannot fathom why you think you are imparting any new information to me, or why (except for rhetorical points, obviously) you keep bringing up 'chromosomal sex'--a red herring you introduced and seem to want to force down everyone's throats.
