A「safe, peaceful」way for「expression of obliging sex」: referring to the actions of a person being「highly flexible」and SUBSTITUTING a EUPHEMISM, elegantly substituting one socially unacceptable, politically incorrect, no-longer-funny, misogynous, misandrous, sexist, racist, homophobic, lesbophobic, queerbophobic, transsexually-phobic, heterophobic, arachnophobic, necrophiliac-phobic, xenophobic, bigoted, parochial, insular, isolationist, ethnocentric, disgusting or disagreeable word with some different word in order to obfuscate the bluntness and show one's 'good taste' among polite situations, something common also among kanji glyphs that you may have noticed…just as the no-longer-integrated foot in dynastic China substituted for other orifices that have mucous membranes and are more difficult to sanitize became EUPHEMISTIC of quintessentially sublime eroticism, the「safe, peaceful way for expression of obliging sex」or,「female with deliberate evening activities and emphasis on surrounding bent penis with no-longer-integrated foot.」
Glyph acquired the meaning of ELEGANT, GRACEFUL, RESTRAINED, i.e., using euphemisms as a restrained way of expressing a substitute rather than saying the crass or obvious term, including wit, sarcasm, irony, double and triple entendre, simile, metaphor, allusion, humor, subtlety, lampooning, etc.,「surrounding, deliberately out-of-reach」what is not being said openly「from above」about「evening meat joined together with a tight seal, curling penis with no-longer-integrated foot」and so on. Examples of English scatological euphemisms that have been used so often that the original word has been nearly forgotten are: 'toilet' (a French word referring to one appearance and grooming) instead of 'latrine bowl fixture.' 'pee' (first letter of the word 'piss' from the French 'pisser'…really) in place of urine, to urinate. And 'poop' (the stern, back end of a sailing ship) to replace 'feces,' all of which are already perfectly fine words for those matters and need no substitutes. Defecating while squatting and extanding one's buttocks from the poop deck reduced the likelihood of any feces subsequently clinging to the ship.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: graceful; tactful
Japanese EDRDG: graceful
Unihan extended: amiable, congenial; restrained