Why do men have nipples?

Men also have nipples, which are an accessory organ of the breast. Men not only have nipples, but also mammary glands. For men, this is a congenital reason in tissue embryology and there is nothing to be surprised about. Men may also suffer from breast diseases, and even a small number of men develop breast cancer. Therefore, men should also pay attention to the care of their nipples.

The main reasons are:

Diseases of the adrenal cortex, the main site of estrogen secretion, can cause abnormally high estrogen levels. When the liver, the site of estrogen metabolism, is diseased and accompanied by liver dysfunction, estrogen can accumulate in the body. The testicles are the main organ that produces androgens. Testicular tumors and congenital testicular dysgenesis can lead to reduced androgen secretion, and estrogen levels will increase accordingly. Some drugs such as progesterone, isoniazid, tricyclic antidepressants, and digitalis can affect estrogen metabolism and induce breast enlargement.

Why do men have nipples?

From the perspective of tissue embryology, the primitive embryonic stage is asexual (all will have breasts by default). However, there is a sex-determining gene SRY (sex-determining region of Y-chromosome) on the Y chromosome, which is a switch gene that stimulates the male differentiation of the gonads of both sexes in mammals. Starting from the sixth week of embryonic development, the gene on the Y chromosome is activated, which will stimulate the primitive gonads to develop in the direction of testes. The initial testes begin to secrete androgens, stimulating the male embryo to develop in the direction of masculinization.

In the picture, the size of the X chromosome is obviously larger than the Y chromosome, and it carries more genes than the Y chromosome. In fact, the genes of men and women are basically the same. Except for the pitiful few genes on the Y chromosome, all genes can appear in both men and women. Men are made from almost the same recipe as women, so it is not surprising that they are somewhat similar in appearance.

What is the use of male nipples?

As for the role of male nipples, we have summarized the following points: Aesthetics. Without nipples, the bare chest is obviously not good looking.

It is convenient for medical positioning. When doing cardiopulmonary resuscitation (CPU) first aid, you can press slightly below the midpoint of the line connecting the two nipples.

Used to provide stimulation. "Pull hard" (generally, the consequences of fainting caused by emotions are not serious, and you can give him some stimulation at this time. Slapping, pinching the philtrum, and pulling the nipple hard are all effective methods), or it can also be stimulated during sex. A placebo for children. It is said that sometimes the father's nipple can temporarily soothe the baby's emotions.