Likely used for inseminating ewes, horses, swine, cattle, and so on: ANIMAL HUSBANDRY. Note that in order for humans to successfully inseminate a large farm animal manually, an arm must be inserted deeply into the subject animal's anus and a firm grasp of the cervix from within the colon is required prior to inserting the end of the tube containing semen (two orifices are used), not to mention that using the semen of the same species of female animal being inseminated helped also:「sneer, ridicule, laughing out loud, giggling, snickering, sexual activity aids with two orifices in hind legs, vagina.」In the old days, the outer end of that tube was likely blown into forcefully, creating sufficient internal tube pressure to ejaculate (a blowout) the stored semen, and that semen was most likely obtained by masturbating the donor male animal just as it still is performed today:「snickering with sex aids」(think about it: there is no other way to extract the semen…). A long collection cylinder tube, closed on one end and obviously one much wider than used for insemination into the cervix, was placed over the male animal's glans to collect the eventual outcome as the fruits of human-assisted bestial masturbation. It has been speculated that this very semen collection activity, in particular when performed with stallions, boars, and bulls, became a popular spectator sport as the true origin of the「breeder's cup.」
　「…[A] fully grown stallion can produce around eight billion sperms, with a semen volume of 80 ml [approximately 2.7 oz.], at the concentration of a hundred million sperms per ml. …You should be in a good position to know that the ejaculate's volume is not that important, provided your stallion back at home is healthy and the sperm count is high. Most people recommend drinking horse semen and also bull semen.」(no reason to waste any leftovers, eh?)<>　[　https://tra-online.com/how-much-sperm-does-a-horse-produce/ 2021-10-28　]　
　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: large pipe
Unihan extended: a large pipe; a farm tool