What happened to the ancestors of East Asians who migrated from East Africa and crossed the Pamirs?

Human body odor mainly comes from sweat secretion. According to different races, the exuberant degree of sweat secretion is also different. People who are too exuberant have apocrine glands, and the sequelae of developed apocrine glands are called smelly sweat. We often call it underarm odor and body odor.

The apocrine gland, which looks sour and refreshing at the bottom right of the picture below, is a small part lacking in the deep skin of China people.

Generally speaking, people in East Asia, represented by China people, have light body odor, while people in Europe have extensive sweat glands and heavy body odor. We smell a fishy smell, and when we get to Africa, this smell will spread to thousands of households. Considering the different sanitary levels in the above two places, it is entirely possible to award the championship trophy to the African brothers.

The picture below shows the development degree of apocrine glands, which can also be called body with body odor. The bigger the blue area, the more serious the body odor.

In fact, the word "body odor" itself comes from "Hu". Like carrots, they are not made in China and have strong exotic characteristics.

The smell of body odor comes from sweat. Staphylococcus on the surface of human body will decompose into monomers after absorbing sweat nutrition. The more you sweat, the more monomers you have, and the greater the odor generated by volatilization. Apocrine glands are the only weapon to produce sweat. Ancient humans were all apocrine glands. Sweating means rapid heat dissipation, which is dominant in hunting activities, lasting and will not explode.

Hormones produced by apocrine glands are also the main means to attract the opposite sex.

The problem of eating color has been solved.

When the ancestors of East Asians gradually migrated from the grasslands of East Africa to the established places and crossed the Pamirs, a miracle happened. No one knows what happened here tens of thousands of years ago. All we know is that most of them have gene mutations, and the genes with developed apocrine glands have been screened out. After coming to East Asia, from the fishing and hunting civilization chasing prey all over the grassland to the farming civilization, the advantage of apocrine glands has become the skill of killing dragons in terms of "food", which seems useless.

Let's talk about the hormone of "color" first. Many love novels are fresh and refined-"I like the smell of hormones in him very much" or "she is full of young hormones", and no matter how romantic it is, it still smells like sweat.

Generally speaking, "the same smell" can be understood as the same race, such as the same Indian. The smell of the opposite sex is simply a smell that can make your muscles crisp and your legs soft at a young age (I dare not prove it with curry smell).

There is more exclusion between the same sex. In order not to make too many enemies, perfume has become a popular social etiquette scheme. If their curry and perfume are delicious, personally, this is a nightmare for our sense of smell in East Asia.

Even in China, the degree of body odor is different. The body odor rate of Han nationality is about 6% to 10%. I don't have a distribution map of body odor at hand, but I have a national distribution map of dry cerumen, which can play a substitute role. The darker the color, the lower the body odor rate. What is earwax? It's actually earwax. Dry earwax is the normal state of most Han people, and oily earwax is often accompanied by body odor. If you are not so sensitive to the smell of armpits, you can also verify it by pulling out ear wax. Oily earwax, also known as earwax, is a greasy, sticky and moist substance. If it is not removed, the whole ear can be easily soaked. Let's put a picture full of malice. The ears of people with body odor in Europe and America are basically like this: Therefore, European and American girls must have a delicate bag, perfume, cotton swabs and razors. Generally speaking, apart from heredity, young people, oily skin and women are the three groups prone to body odor. If you have the above three points perfectly, I'm sorry, body odor is waving to you.

As a woman, her body surface will have half as many secretory glands as men. These glands are mainly distributed in axilla, groin, anus and navel. The arrival of menstrual period more or less contributed to the production of body odor. Speaking of body odor, the influence of diet is also considerable. Let's not talk about the magical curry of Indians. The garlic flavor, hot pot flavor and stir-fried flavor that China people like to eat are easy to gather on clothes and inevitably spread to the skin surface. Therefore, don't think that only we East Asians are laughing at the body odor of Europeans and Americans. They also generally react, and can't accept the taste of all kinds of dark dishes in China.

Excluding the cooking smell, many people in Europe and America think that the body odor of China girls is closer to a faint grass smell, and there may be a faint rust smell during menstruation. No matter what the smell is, it is the smell of our men in China.