Chinese glyphs often depict a clear analogy of bow and arrow weaponry with a client using the no-longer-integrated foot of a service provider: the inner foot arch and arched shape of the archery bow (弓「end-to-end, side-to-side with no-longer-integrated foot」) in use with an arrow (the penis 矢「head on taut thrusting shaft」) drawing back and forth nocked in a bound string (糸「stringy emissions from rod, loose and dripping with small youth」) for discharges (放「person coercion, side method for prostrated whacking」).
「End-to-end, side-to-side with bound foot」depicts a used and LOOSENED, long cloth that has just been removed from the no-longer-integrated foot of a concubine or service provider and therefore cannot hang straight, and is full of CURVES, ARCHED SHAPES due to having been wrapped around a foot for a long time, likely in need of washing. Describes the ARC SHAPE of no-longer-integrated feet when wrapped very tightly with a long cloth「in extreme tension a long time causing gasps.」Refers to anything having a CRESCENT shape, or a stringed musical instrument, perhaps an early version of an erhu, also any sort of STRINGED BOW such as for playing a violin. does not refer to an ARCHERY BOW in every usage case…assuming so will cause some confusion.
This element substitutes in some modernized glyphs to replace「backbone」and「connected」(呂 related glyphs) which also resemble the shape of a no-longer-integrated foot and mean ARCHED, BENT OVER and likely IN NEED OF WASHING. Additionally, this element is used to replace genital orifices (㠯, also often having a curved shape), used in the same manner as the were the no-longer-integrated feet up until recently (the feet, that is).
Note that with the cloth bindings removed, the no-longer-integrated feet are now ready for action, hence that condition of readiness is also signified by this glyph used as an element:「Qing Dynasty sex manuals listed 48 different ways of playing with women's bound feet.」
[ https://en.wikipedia.org/wiki/Foot_binding 2012-12-17 ]
Depicts a foot after the bindings had been removed to expose the deep slit created by bending the no-longer-integrated foot over and forming a warm, moist pouch within the sole of the foot, a small 'scoop for fluids' as it were. Note the similarity with 己,「decrepit condition of a penis」instead of the decrepit condition of a no-longer-integrated foot, and that the poor quality of the condition of each was likely the cause of the other. Both 己 and 弓 represent bent and disfigured body parts that perhaps coincidentally were fitted together as complements by the shamans in life and sages for writing.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: a bow (weapon)
Japanese EDRDG: bow (archery, violin)
Unihan extended: bow; curved, arched

Used within names (nanori)
こ　･　ゆ