[Japanese variant]「many long strokes, hair too long」「loose and dripping hair」「to be friendly, hand in crotch.」Useful for attracting members of any sex, a shaven crotch sends a strong signal and seems to assure that「no pubic crabs reside here」as「a friendly means of grooming oneself」and a friend is useful for lending a「hand in crotch」when shaving one's genitalia—hey, what are friends for, anyway? and clearly, the best way of「being friendly with bush hair」is to simply keep it SHORN.
　Chinese variant uses「dog with spread feet, crossing back and forth with hand」as the lower element, and every dog surely seems to enjoy having its belly scratched and petted between spread legs while laying back with tongue hanging out and tail wagging, and to do so you must touch its short belly HAIR, in every case—by the same token, most human dogs will behave the same way when shaving a pussy, or afterwards, since the contained loose and dripping is so much more pleasant for all concerned when there are no obstructing pubic hairs. As a friend for「crotch strokes」「two contained arrayed loose and dripping」is an unambiguous reference to shaving the pubic HAIRS. Note that an old version uses「quintessential, head hanged, cut off at the neck」as the lower element, depicting one remedy for a hanging glans head that has lost some of its spunk, and shaven pussies did help with shaman's revenue stream with those baying-dog clients, as well as serving to keep the crab cases at bay. Keeping one's hair trimmed neatly or shaven,「hair」in a「friendly fashion」when preparing to meet with the fief lord, owner, master, boss, or even just a casual friend.
　UNKEMPT, SLOVENLY describes most anyone in a hungover condition, hence perhaps this glyph was the source of the English,「hair of the dog」to cure that sort of pain:「'The hair of the dog' [that bit me] is unusual in that the figurative version is recorded before any known examples of the literal meaning.」　[　https://www.phrases.org.uk/meanings/hair-of-the-dog.html 2019-05-26　]　…which makes one wonder if the literal meaning isn't merely some trumped up bullshit story (see website for details).

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: Japanese variant of 髮|发
Japanese: hair, barrette, clip, hair slide, hair band, to comb
Unihan extended: hair
EDRDG: hair of the head

Used within names (nanori)
がた　･　ひげ