In the old days, shamans acted as notary publics for all sorts of purposes related to their goods sold and medical services provided (for an additional fee, of course). Glyph has been simplified (from 證), previously combining「intercourse」(言) with「climbing on, climb aboard, to mount on top」further comprised of「clitoris with meat in spurting stance」(登) or「clitoris meat in lordosis position」(豋) meaning TO DEMONSTRATE PROOF and VERIFICATION OF THE FACTS as they applied to the purchase of a new concubine, and the need to prove by visual inspection and actual use whether the terms of sale were in fact represented in the obtained goods, the product.「Words correct, accurate」are TESTIMONY, as PROOF, EVIDENCE, or a CERTIFICATION of something or other (see 劵 and 券 for other details). Nevertheless, most anyone could presumably continue to speak lies after being sworn on the witness stand. Groups of witnesses sometimes collude to falsely substantiate testimony, but FIVE SPEAKING the same thing may have been considered proof.
「Disorder, strife, fighting and confusion with rod up in various ways」also speaks to the shaman's duties as witch doctor who could certify the healthy or unhealthy condition of a penis rod upon a thorough examination, PROVIDING PHYSICAL EVIDENCE OR PROOF, and issue CERTIFICATES stating so that enabled re-entry beyond the brothel gates.
Modern elements of「intercourse reform」appropriately means to ADMONISH in Chinese, to be reminded of a forgotten or disregarded obligation or responsibility (again, see 劵 and 券 for details of the certification process).
Although virgins were and still are routinely bought and sold worldwide, the Japanese did not perform foot-dis-integrating generally, and have substituted「in the proper position」(正) in place of「clitoris with meat raised in lordosis position, climb aboard and mount upon」(豋). Note that elements as「proper foreplay and intercourse」is somewhat of a misnomer, since apparently any activity as sexual intercourse was proper, as long as it resulted in a climactic response. While in the (proper) lordosis position, a female's genitals will be fully exposed, particularly from a view beneath or behind, for the purpose of verifying prior to the actual dis-integrating whether a hymen was intact as PROOF, EVIDENCE, that must be WITNESSED, that later can be TESTIFIED as to the「accuracy of statements」regarding her virginity, a condition not taken lightly since it increased her resale value and the contract price considerably.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: to admonish; variant of 證|证
Japanese EDRDG: evidence, proof, certificate
Unihan extended: prove, confirm, verify; proof