Elements of「horse in cavity」using the old zodiac glyph meaning「Horse」(午). Most likely, depicts a method of preserving horsemeat for later consumption. Even today, China and Japan are relatively large consumers of horsemeat. Wild horses were often hunted for meat in Asia.
　A「container」and a「pestle」for mashing in the contents of a CAN, as it were, containing「canned」food. Preserving foodstuffs by the CANNING PROCESS: heat the contents to boiling with a lid applied that self-seals after heating, so that after the contents cool, a vacuum seal is created by the residual lower air pressure inside, and the heating process destroys bacteria, preserving the food (hopefully): MEAT PACKING is also the source of the English word「to botch」that formerly referred to a failed attempt to properly preserve meat for future use (same reason the Chinese used rock pestles to dis-integrate feet and then pack them into bindings), creating a prime breeding environment for pathogens…in the case of meat canning, the pathogen of botulism ('botch'-u-lism).
　Also evident with elements as「horse pestle in cavity」packing meat…even if measured by human standards, horses do tend to masturbate rather frequently, about every ninety minutes or so (see 馬), with the sort of meat packing alluded to in this glyph being the activities of a bored human female.
　As an element in other glyphs, literally「head downward thrusting penis in cavity」as a female packing her own meat, referring to dildo manipulation and regularly masturbating, an activity that garnered no shame or embarrassment in dynastic China—quite the contrary, with masturbation being encouraged to prevent the spread of infection (these days, too), celebrated to be enjoyed until old age worthy of congratulations (寿), and the frequent subject of fine art evidenced by porcelain, ivory, and jade dildos.
　Note that various glyphs pronounced in Japanese as kama have been suggested as the referent to a male homosexual (缶, 构, 釜, or 銍), with these elements「horse, head downward thrusting in cavity, meat packing」as one possibility. Perhaps the reason why in English a buttocks is sometimes referred to as a「can」with the same reasoning applied to a LAVAtory commode or toilet bowl.
　And finally,「head sliding dry in cavity」and「horse, horsing in cavity」seems to refer to straddle-mounting and riding upon a herd asset animal as one might mount and ride a horse while performing mammary intercourse-style masturbation, better understood as「tit-fucking」(no further explanation needed).
　「…many people, perhaps unfortunately, feel shame around masturbation, despite the fact that 98% of people will masturbate at some point.」
　 　[　https://www.health.com/mind-body/health-diversity-inclusion/autosexual-meaning 2022-12-13　]　
　Without a doubt, the Irish also have knowledge of their own to pass along in these trying times:「Masturbation will not spread coronavirus, especially if you wash your hands (and any sex toys) with soap and water for at least 20 seconds before and after.」Nonetheless and regrettably, unlike in dynastic China, it must be undertaken alone to truly be a preventative countermeasure but still achieve the desired result with some degree of safety.
　 　[　https://www.sexualwellbeing.ie/sexual-health/sex-and-coronavirus/ 2020-03-31　]　
　The Dutch, too have the same solution—it seems masturbation has become mainstream in the media the world over due to the coronavirus (it has always been 'the main stream' in reality, albeit covertly for most folks):
　「'Don't have sex with your partner if they have been isolated because of (suspected) coronavirus infection,' the RVIM says. 'Sex with yourself or with others at a distance is possible (think of telling erotic stories, masturbating together).'」
　　[　https://www.theguardian.com/world/2020/may/15/dutch-official-advice-to-single-people-find-a-sex-buddy-for-lockdown-coronavirus 2020-05-16　]　
　Needless to point out perhaps, but Chinese shamans from antiquity hit upon the same solution as a pandemic preventative countermeasure, honed for ultimate client satisfaction by utilizing naked females with no-longer-integrated feet as masturbatory sex buddies available for short-term rental with erotic visualization of live prepubescent female genitalia engaging in autoerotic stimulation herself, as a solution to the same problem facing us now, but in pre-Internet days.

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: pottery
Japanese: boiler, can, tin, fat-bodied, small-mouthed earthenware jar for carrying water, water vessel used for a baby's first bath
Unihan extended: earthen crock or jar
EDRDG: tin can; container; jar radical (no. 121)

Used within names (nanori)
ふ　･　べ