Elements are「rod」with「talented limbs (rather than literal 'hands' in this case)」and「vertical reciprocating motions」「bounce, tension, spring」and「emissions.」HORSES are tense, skittish at times: the animal gallops (see 帆) using one toenail from each leg, no less (the third, or middle toe, in case you are interested), so it does seem a little high strung to be not just 'on its toes' all the time, but literally 'vertically bouncing up on one toenail' from each limb. In addition, unless fully relaxed and feeling safe, horses sleep in a standing position by locking the knees, enabling a quick start for escaping in the event a predator appears. The first use of horses by humans was not to mount them, but to hunt them as a high-protein meat source, and raw horsemeat sashimi is widely available in Japan today.
　In addition, perhaps these elements may also be an inverted prick (龶) with「long time in tension and many emissions」since the horse's penis while masturbating hangs inverted, and quite low due to its length. Simplified Chinese uses「clever」(刁) as the lower element, the equivalent of「tense and many emissions.」And, horses prefer to run in herds, a type of 'flocking together' (与).
　As one defining characteristic that these elements depict, HORSES naturally perform「array of clever, vertical talented tension bouncing for emissions」on a regular basis, masturbating on average about every hour and a half when in the wild, with the observed median count by one researcher as TEN TIMES PER DAY 　[　https://arfer.net/w/esa/animast 2020-01-23　]　
　In that regard, inner elements are undeniably「rod vertical in reciprocating motion once and once again.」Before the age of automobiles when everyone either rode a horse, ass, mule, camel, yak, or walked, most folks knew much more about horses and their proclivity to self-pleasure regularly, a fact that has given rise to the English expressions of 'horsing around' that refers to jag offs at horseplay who are supposed to be working, holding one's horse(s), beating a dead horse, straight from the horse's mouth (that is, an orifice), getting on a high horse, and so on. The 'mouth' in those expressions being his meatus, the mouth of his huge penile organ.
　「Sue M. McDonnell, PhD, is an equine behaviorist on a mission—to inform and educate horse owners and handlers that stallion masturbation is normal, healthy behavior and that trying to discourage such behavior is likely to do more harm than good. McDonnell holds a PhD in reproductive physiology and behavior, and she is the director of the Reproductive Behavior Program at the University of Pennsylvania's New Bolton Center. McDonnell and her research team have conducted several studies pertaining to masturbation in equids, and after years of research and investigation, McDonnell concluded that stallion masturbation is normal, healthy behavior in equids—and perhaps even necessary for healthy sexual function. …Masturbation in horses, ponies, donkeys, zebras, etc., involves extension of the penis and rhythmic bouncing, pressing, or sliding of the erect penis against the belly. Some stallions might even include pelvic thrusts. Although the penis enlarges as in copulation, and some pre-sperm fluid might drip from the urethra, masturbation rarely results in ejaculation. …'During the past decade, spontaneous erection and masturbation has been found to be normal, natural behavior not only in equids, but in all mammalian species, including man,' McDonnell said. 'In horses, however, masturbation is often mistaken as a vice by horse owners, trainers, and veterinarians.'…masturbation is not an aberrant behavior like vices such as pacing, weaving, cribbing, or digging, although many horse owners seem to think so. With other vices, horses often exhibit anxious behavior, whereas stallions appear calm and relaxed while masturbating. In her studies, she found that even wild horses and zebras, which roam freely, would masturbate on a regular basis. 'We have observed: zebras in the wild, zebras in zoos. Donkeys in the wild. Horses in stalls, horses in pastures. Animals for breeding, animals which are not bred. Stallions which can see females, and stallions which cannot. Bachelor stallions, and harem stallions out in the wild. And they all masturbate about every 90 minutes,' McDonnell said. 'In fact, wild horses are much more regular, probably because they are not affected by all the distractions of captivity.'」
　　[　https://ia802906.us.archive.org/0/items/largeanimalinternalmedicine/16-%20Understanding%20Horse%20Behavior.pdf 2023-05-17　]　
　「Evolutionary biologists have traced the origins of masturbation to ancient primates that predate the first humans by tens of millions of years. The findings emerged from what scientists believe is the largest dataset ever compiled on the activity, and confirm that humans arose on a branch of the tree of life replete with self-pleasuring predecessors. 'What we can say is this behaviour was present around 40m (40,000,000) years ago, in the common ancestor of all monkeys and apes,' said Dr Matilda Brindle, the lead researcher on the study at University College London. 'It's not that some species woke up one day and started doing it. This is an ancient, evolved trait.' '…This is such a common behaviour across the animal kingdom, I find it absolutely baffling that nobody has researched it before,' said Brindle. 'For people who think masturbation is wrong, or unnatural in some way, this is perfectly natural behaviour. It's part of our healthy repertoire of sexual behaviours.'」
　　[　https://www.theguardian.com/science/2023/jun/07/origins-masturbation-traced-back-primates-40m-years-ago　]　
　And, for what it is worth, assuming no one is telling lies while HORSING AROUND:「78 percent of adults in the world masturbate, including: 96 percent of British men, 93 percent of German men, and 92 percent of American men. 78 percent of British women, 76 percent of German women, and 76 percent of American women」
　　[　https://www.prnewswire.com/news-releases/worlds-largest-masturbation-survey-uncovers-how-traditional-views-of-masculinity-prevent-men-from-having-fulfilling-sex-lives--relationships-300638644.html 2020-01-23　]　
　「…many people, 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: horse; horse or cavalry piece in Chinese chess; knight in Western chess; abbr. for Malaysia 馬來西亞|马来西亚
Japanese: horse, promoted bishop, -drawn sleigh, person of doubtful origin
Unihan extended: horse
EDRDG: horse

Used within names (nanori)
た　･　ばん　･　め　･　も