Intersex - having both a penis and a vagina

In reality, a person may possess both a fully functional penis (capable of erection and ejaculation) and a fully functional vagina.hermaphroditeThis settingIt does not exist.You can't make a hole and a pillar at the same time; the body isn't Lego.

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Why can't "dual full functionality" coexist?

During human embryonic development, the reproductive system has only one branch; choosing left means you can't choose right. Wanting both to be fully functional? The body says, "I don't have that kind of budget."

Turf war among organizations of the same origin
penisandclitorisIt is the same original organization (Genital tubercleIt grew out of the ground.
Androgens are coming in → Penis growth (lengthening)
No androgens coming in → Clitoris becomes small and cute
Can the same organization both grow longer and shorter simultaneously? That's...rubberIt is not a human body.

Genital tubercle(English: genital tubercle) is a tissue present during the development of the reproductive system, formed in...mammalembryoThe caudal region of the abdomen ispenisorclitorisThe primordium.

humansfetusGenital tubercles form around the fourth week of pregnancy, and by the ninth week, the penis or clitoris can be identified. Afterward, the term "genital tubercle" refers to the tip of the original genital tubercle, which will develop into...glans penisorClitoris.

Hormone fight
For the penis to achieve an erection and ejaculate, normal testicles are needed, along with testosterone (androgens).
For a vagina to have a uterus, ovaries, and the ability to ovulate, it requires estrogen plus no anti-Murray hormone (AMH).

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Real-world "intersex"—don't get your hopes up, it still only has one set of functions.

There is indeed a medical condition called "true hermaphroditism" (ovotesticular developmental abnormality), in which the body contains both ovarian and testicular tissue.

However, the following problems will arise:

• Penis usuallySmall and crooked(Hypospadias), ejaculation? Dream on.
• vagina usuallyhypoplasiaIt is often a dead end (blind spot), and the uterus is also an ornament.
• Very few are able to reproduce, but...You can only choose one sideEither become a mother and get pregnant, or (extremely rare) become a father and get pregnant.

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Can modern medical surgery achieve that?

Originally a boyIt is possible to artificially create a vagina, but that is for "decorative purposes." It has no uterus or ovaries, cannot become wet on its own, and cannot give birth.

Originally a girlA penis can be made from a skin flap from the arm, and then an artificial erectile device can be added, but...Unable to ejaculateThere was no sperm.

Further reading:

• A detailed comparison of the sexual styles of women in Laos and Indonesia.
• A detailed comparison of the sexual styles of women in Laos and Singapore.
• What's it like for a man and woman to be in a woman-on-top position plus a reverse woman-on-top position?
• What does it feel like to penetrate a woman's vagina?
• What does it feel like for a woman to be penetrated by a penis during sex?