Why do men have hair in anus? Combining scientific explanations with hot topics
Recently, hot topics about human physiological characteristics have once again sparked discussion, among which "Why do men have hair in anus grow hair" has become one of the hot topics in search. This article will combine the hot discussion content on the entire network in the past 10 days to analyze this phenomenon from a scientific perspective and attach relevant data comparison.
1. The role of anal hair and scientific explanation
Hair around the anus (abbreviated as anal hair) is a normal physiological feature of the human body, and its main functions include:
| Function | Scientific explanation |
|---|---|
| Reduce friction | Cushioning the direct contact between skin and clothing |
| Isolate bacteria | Block external pollutants from entering sensitive areas |
| Adjust humidity | Helps sweat evaporate and keeps locally dry |
| Evolutionary Residue | Traces of degeneration of primate body hair |
2. Related topic popularity data in the past 10 days
| platform | Searches (times) | Number of discussion posts | Hot search period |
|---|---|---|---|
| Baidu | 18,500+ | 2,300+ | July 15-20 |
| #Male Health# topic read 12 million | 4,600+ | July 18 | |
| Zhihu | Professional answer received likes 8.2k | 1,700+ | July 12-22 |
3. The top 5 questions from netizens
| Ranking | question | Percentage |
|---|---|---|
| 1 | Does anal hair need to be trimmed? | 42% |
| 2 | Is it normal to have no anal hair? | 28% |
| 3 | The relationship between strong anal hair and sexual ability | 15% |
| 4 | What to do if anal hair causes hygiene problems | 10% |
| 5 | Do women also have anal hair | 5% |
4. Views of medical experts
1.Professor Li, Department of Dermatology, Peking Union Medical College HospitalIt is pointed out that "anal hair is the final hair, and its density and length vary in individual terms, which are related to hormone levels, but are not a disease characterization"
2.Director Wang of the Department of Anorectal Medicine of Shanghai Ruijin HospitalReminder: "Over-trimming may cause folliculitis, so it is recommended to keep it clean. Professional tools should be used to disinfect when trimming for special occupations."
5. Comparison of differences in cultural concepts
| area | Cognitive characteristics | How to deal with it |
|---|---|---|
| East Asia | Deemed as a privacy topic | 63% choose not to process |
| Europe and the United States | Included in routine care | 58% regular trimming |
| middle East | Religious Cleanliness Requirements | 72% use hair removal agent |
6. Latest scientific research progress
In July 2023, the Journal of Human Biology released a study showing that the density of anal hair is related to the expression of ABC gene clusters, and the hair follicles in this area are 3-5 times more sensitive to dihydrotestosterone than scalp hair follicles.
Conclusion:Anal hair is a normal physiological feature preserved by human evolution, and recent hot discussions reflect the improvement of public health awareness. It is recommended to look at it scientifically and pay attention to basic cleaning without excessive anxiety or blind treatment. If itching, redness and swelling are accompanied by symptoms, seek medical treatment in time to check for pathological factors.
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