「Extraction」that「causes sighs」as a GREAT RELIEF to both service provider and client of pent-up anxiety, and likely some seminal fluids. Top element of「extraction」formerly was written as 凷, either「within anal soil cavity」or as「penis within a cavity」(see as examples 屆, 届), both suggesting「extraction, dripping」from「horizontal motion, rod with gasps」or from「busted foot.」Also be aware that in the old days, KNIGHTS galloped on horses frequently whilst displaying their lance, spear, or other weaponry (see 馬 for details), so this glyph may represent a client pleasing a service provider her way, whatever way she desired, rather than insisting upon his own selfish pleasure: BEING CHIVALROUS as in「marked by gracious courtesy and high-minded consideration especially to women」
　　[　https://www.merriam-webster.com/dictionary/chivalrous　]　
　In that sense, perhaps the chivalry of a dynastic Chinese「knight」gave euphemistic reference to the gallantry of a set of dildoes, unflinching in action, courteously attentive male-shaped lovers as a HIGH-MINDED CONSIDERATION OF A WOMAN: Japanese pronunciation describes BEING BUSY, UNABLE TO REST, TO BE ACTIVELY ENGAGED PERFORMING A NECESSARY TASK.
　As depicted in erotic Chinese art, men in dynastic China masturbated by wrapping no-longer-integrated feet around an erect penis ostensibly to lower the risk of contracting a sexually transmissible disease or infection that often occurred when performing coitus within some sort of mucous membrane system of a female service provider, and, to gain hand-control over the pressure applied to the foot meat surrounding a weakened penis that functioned as a living cockring:「Bound feet were once considered intensely erotic in Chinese culture. …The process was started before the arch of the foot had a chance to develop fully, usually between the ages of 2 and 5. …Qing Dynasty sex manuals listed 48 different ways of playing with women's [no-longer-integrated] bound feet」(after removing the binding cloths, of course)
　　[　https://en.wikipedia.org/wiki/Foot_binding 2012-12-17　]　

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: chivalrous knight