Pundits say initially referring to a chunk of hardened bamboo (perhaps a slat) used for record-keeping, then the number of those slats, and now as a counter for anything inanimate, unmoving.「Hardened bamboo」makes a fairly good spear when sharpened, in a pinch, and this glyph is also the counter for military units.
　Nevertheless,「lordosis position bowing down on all fours when clotted and hardened, enclosed old crap in penis cavity, accessed through a screwing orifice」exactly describes treatment of prostatitis, when many INANIMATE CHUNKS OF MATTER are dislodged and expelled:
　「…[M]any wives, girlfriends, male lovers and just plain friends have learned how to do drainage. Providing that nails are clipped and a non-latex surgical glove (available widely at drug stores) lubricated with K-Y jelly, is used, little harm can come from trying. However, if you have acute epididymitis, you should not do drainage.」
　「If the man is [lying] over some pillows or kneeling, stomach down, and the 'drainer's' hand is facing the floor, all one has to do is curl one's finger slightly and feel around, and the outline of the prostate gland can be detected. Stroke as firmly as possible from the outside to the lower center. Stroke very, very slowly and firmly, so that the contents of clogged acini are squeezed out.」
　「The drainee will be very uncomfortable. This is not fun. It might be a good idea to place a towel under the drainee, because stuff does come out. It might take several sessions before you both get good at this. Talk while it is happening. The person being drained may have some trouble expressing himself due to groaning, so the drainer should pause (without withdrawing) if the person being drained seems to have something to say.」
　「After the first few sessions some added burning may be noted, due to what is being drained. This will improve. Also, some blood in semen may be noticed at first. In this case, back off on the pressure and frequency of drainage and go more slowly. Blood is not a positive sign, but it should also not be a cause for panic.」
　　[　https://www.prostatitis.org/wifedrainage.html 2013-09-02　]　

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: variant of 個|个
Japanese: counter for the ichi-ni-san counting system, a noun read using its on-yomi, counter for articles, counter for military units, individual, counter for the hito-futa-mi counting system, one by one, separate
Unihan extended: numerary adjunct, piece; single
EDRDG: counters for things