Why is the woman's bottom black?

As we all know, many people in the world have different skin colors. Some people have white skin from birth to death, some have yellow skin, and some have black skin. For example, people in African countries have dark skin mainly because of long sunshine hours and strong sunlight. So why are some women also black below?

It is true that sexual intercourse can make the vulva darker. During sexual intercourse, the vulva will be rubbed, and during the friction, pigment will be deposited. Therefore, women with many years of sexual history often have dark vulva. However, some women's genitals are dark even if they do not have sex. This is because some people are born with dark genitals, or it may be due to racial reasons. These are all normal phenomena, and female friends do not need to worry too much.

The above is a brief introduction to why female vulva turns dark. I hope it can help relevant women. Some people say that the darkening of the vulva is a sign of strong female sexual desire. This is actually nonsense and has no scientific basis. Women with this condition are not too worried about their health problems because there is no gynecological disease with the prominent symptom of darkening of the genitals.