「Cattle, chattel, herd of meat livestock assets」with「spread legs」and「penetration reaming」that refers to a lord's「important stuff」his SYSTEMATIZED MANUFACTURING of harem meat. Instituted by IMPERIAL COMMAND, maintaining the harem in China was first used to MANUFACTURE a complex man-made SYSTEM of safe sex outlets for the dragon emperor in order to prevent the spread of disease with many RULES and LAWS, as well as to increase the pure joy of it all.
　Eunuchs scoured the countryside for eligible virgins and then maintained in RESTRICTED ACCESS to protect the investment of time and resources. Obviously, candidates were necessarily very young since most females were deflowered by close male relatives as soon as the opportunity presented itself, at least until the bare-boned benefits of selling one's daughters to stave off starvation were realized as the nascence of a trickle-down, supply-side economic SYSTEM (nevertheless, see 蝉「female cicada」for the medium-term effects). Needless to point out is that when possible the emperor also was restricted to use of only that herded meat SYSTEM, for his own protection.
　Note that actual cattle, other than a newborn calf now and then perhaps, were not used generally as copulatory vessels due to the relatively useless size of both anal and vaginal orifices when fitting most clients, and simply being too high off the ground, so instead sheep were preferred as the praiseworthy choice (see 羊 for those details). Bovine tail being much more obtrusive than that of ovine, and calf skin often lacked the handy curly fleece of sheep used for grasping whilst thrusting with control, which contributed to the latter's popularity.
　Combines elements of「pull-out withdrawal of rod in spread legs」and「reaming, cutoff」or「master's head screwing in soil excrement with rod in spread legs cut off, severed, no more」as SUPPRESSION, RESTRAINT, HOLDING BACK due to an IMPERIAL COMMAND, LAW or other CONTROL BY GOVERNMENT in the effort to ESTABLISH A SYSTEM TO REGULATE the sex trades and slow the tide of spreading infections in brothels and the shaman's caves o' wonder—or, to the poor man's harem, a herd of ewes, literally as animal husbandry:
　「In traditional Chinese medicine, there has never been a mental disease called pedophilia (or an equivalent term), or homosexuality, or most of the other so-called sexual variations for that matter.」
　　[　https://docx2.com/wp-content/uploads/Are-Any-of-the-Pharaphilias-in-DSM-Mental-Disorders_.pdf 2023-05-14　]　In other words, mostly any sexual action was not only acceptable, most everything was widely practiced unless restrained by imperial command, of course then it must be enjoyed surreptitiously or only by the emperor.
　「Spread legs of meat herd asset with reaming」as MANUFACTURING something, and EXERCISING RESTRAINT, applying some CONTROLS, might be due to a different cause. During ovulation of a female human and estrus of other animals, the individual can become more sexually aroused than at any other time. Adding a dildo and/or an actual penis with enthusiastic action acts just like a kitchen whisk with frothy white discharges whipped up and resembling egg white meringue, mousse, cotton tufts and tassels, or sheep wool:「As a woman's cycle progresses, the mucus secreted from the cervix will change due to hormonal fluctuations. A woman is considered to be ovulating and fertile when the mucus is clear, stretchy and slippery, and looks like egg whites.」
　　[　https://ic.steadyhealth.com/most-fertile-cervical-mucus 2017-05-03　]　

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: to manufacture; to make; system; to control; to regulate; variant of 製|制
Japanese: system, organization, organisation, imperial command, laws, regulation, control, government, suppression, restraint, holding back, establishment, to control, to command, to get the better of, to hold back, to rein in, to bridle
Unihan extended: system; establish; overpower
EDRDG: system; law; rule