Clearly, the only place these elements would obviously refer to an INVERTED FOOT would be in dynastic China:「rod repeatedly screwing in reciprocating motions」「rod changing state, twice, with two in motion」and so on.
　「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　]　
　Element meaning INVERTED FOOT, IMPEDED MOTION that appears within glyphs generally as「herd asset, chattel」(牛) drawn inverted, suggesting a harem asset lying on her back supine, likely with both feet high in the air or up beside her ears. Or, perhaps formed from a「rotated mattock」used blunt side down as a bludgeon by serfs wanting to conserve cash doing the job themselves and not paying professional fees for the preparation work…「busted foot, in tension」element not yet no-longer-integrated but stretched out flat and tensely waiting for the blunt end of the tool to break the bones of the other foot by whacking the sole while lying prone with feet in the air (舛, 韋).
　Related glyph (五) today appears different, but the scholars say that in the old days it seems these both appeared as symmetrical images of one another, lending some credence to「right foot, left foot」as one interpretation.
　Another suggestion of elements as「screwing with biting」may be describing one of the reasons that the use of no-longer-integrated feet as a masturbatory aid was invented in China rather than oral penetration between a set of vengeful teeth during a facialization session (see 齒, 歯, 發 and 発), which goes to explain why these glyphs for「teeth」include the element「foot busting, stop, finish rods.」
　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.