Most cells in our body, even during embryo development, don’t behave any different if they have XX or XY. The only exception is germ cells, which become either sperm or egg cells; these influence surrounding cells to produce different sorts of hormones (AMH and testosterone, and later estrogens, which are made from testosterone). These hormones only have relatively modest effects on body tissues: AMH blocks the formation of the uterus and Fallopian tubes in the embryo, and testosterone allows the Wolffian tubes to develop into sperm ducts and the prostate. Other than those “exist/don’t” actions, everything else is just a matter of stimulating or blocking the growth of certain tissues, or distorting their shape.
Nipples and breasts are just modified sweat glands, similar to those in the armpits and groins, but capable of producing a more enriched liquid. As with every other tissue, their development is exactly the same no matter the chromosomes, and their only response is to hormones. Since they must grow in response to estrogen, they don’t behave any differently during fetal development and until puberty. Theoretically, to do so, they should disappear in response to testosterone in the embryo, but obviously that doesn’t carry any benefit and thus there are no genes that perform this selection.
Yes, I’m aware this is satirical. But idk I’m bored and I just think this whole “idc if we are XX or XY, just give me hormones and I’ll do the thing” being canonical human biology is pretty based.
Explain this, Christians!
Sorry for the late response. I haven’t been on here for a while. Could you expand a little more on your point? Are you saying that men have nipples and therefore there is no difference between men and women? Or are you rather attacking immediate creation of the human being by God and supporting evolution?
I just wanted to know why men were created with nipples
So there is a bit of controversy in whether the creation of the Earth was divinely led evolution or immediate creation by the hands of God. For more research on that I would highly suggest going to the https://www.kolbecenter.org/ and https://foundationsrestored.com/ I was originally of the opinion that it was divinely led evolution. Even to the point of arguing extensively with Protestants for it. However, I then looked into the Kolbe Center’s research and borrowed the foundations restored course from a friend. I have to say, I went in dubious of the proof for direct creation, but they knocked off my socks. They had very solid proofs convinced me pretty well that evolution at least was flawed and rather outdated. That context aside, here is an article that I found on some random creationist website. It offers a very good and cool understanding of why men have nipples. https://askjohnmackay.com/god-created-man-why-men-nipples-wasteful/ It basically says that since Eve was “bone of his bone and flesh of his flesh” (his = Adam), it was necessary that Adam contain all the parts that Eve has. Hence why Adam would have had an XY and Eve and XX. If Adam had had an XX then Eve wouldn’t be “bone of his bone, and flesh of his flesh” because the Y would have had to be placed in her by God. I am not sure how scientifically sound it is as I am not a geneticist, but it is and interesting question that I have taken way too seriously :) Regardless, I think part of the reason God gave men nipples was so that they wouldn’t feel left out :)
P.S. Sorry if I came across a little offensive on my first response.
