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Facial hair is a secondary sex characteristic of human males. Men typically start developing facial hair in the later years of puberty or adolescence, between seventeen and twenty years of age, and most do not finish developing a full adult beard until their early twenties or later. This varies, as boys may first develop facial hair between fourteen and sixteen years of age, and boys as young as eleven have been known to develop facial hair. In addition, the patches of hair can vary between bushy and bristly. Women are also capable of developing facial hair, especially after menopause, though typically significantly less than men. Male pogonotrophy—the growing of facial hair—is often culturally associated with wisdom and virility. Men may style their facial hair into beards, moustaches, goatees or sideburns; others completely shave their facial hair. The term "whiskers," when used to refer to human facial hair, indicates the hair on the chin and cheeks.〔(thefreedictionary.com )〕 == In male adolescence == The moustache forms its own stage in the development of facial hair in adolescent males. Facial hair in males does not always appear in a specific order during puberty and varies among some individuals but may follow this process: * The first facial hair to appear tends to grow at the corners of the upper lip (age 11–15) * It then spreads to form a moustache over the entire upper lip (age 16–17) * This is followed by the appearance of hair on the upper part of the cheeks, and the area under the lower lip (age 16–18) * It eventually spreads to the sides and lower border of the chin, and the rest of the lower face to form a full beard (age 17–21). * Although this order is commonly seen, it can vary widely, with some facial hair starting from the chin and up towards the sideburns. * As with most human biological processes, this specific order may vary among some individuals depending on one's genetic heritage or environment. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Facial hair」の詳細全文を読む スポンサード リンク
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