「Rod upright days」as reference to A WHILE AGO, the GOOD OLD DAYS when someone was still good, or very young, chaste and innocent, not yet infected. Perhaps「speaking of rod's straight days」when a person could still stand upright and unaided, or, 'get it up' unaided, not bent or gnarly.
　However, the most likely combination is「rod with tonguing mouth」and anyone who is both married and monogamous can attest to those elements meaning A LONG TIME AGO. Also referring to THE OLD WAY OF DOING IT, a bit antiquated, outmoded, the obsolete method of providing services (see 児 meaning「child」) prior to the popularity in dynastic China of using the no-longer-integrated feet of little girls instead.
　Note that the glyph 'tongue, tonguing' (舌) also includes elements of「repeatedly bobbing head the old way, screwing with mouth, orifice.」…when employing the old style method, it was fairly easy for a service provider to exact some degree of retribution at will, simply by clenching, with this action that later becoming infamously known as a 'full-mouth bobbitt' similar to Lorena's and John's misadventure (see 傠). Although she may have been able to do that only once in her soon-to-be-shortened life, the damage on the master/owner or the client could not be easily undone even by a shaman witch-doctor. no-longer-integrated feet may have had a protruding bone splinter from time to time but human feet have never had teeth, and with no-longer-integrated feet the squeezing action remained under the control of the user rather than the service providers. Is it mere coincidence that in English the term「pedophilia」means literally both the love of small children and the love of feet?…foot love, child love…so it goes.
　「Viewing women as commodities [see 品] was also made customary…, both in the suddenly expanded labor market and within relationships. Men could sell their female kin to slavery or prostitution, and frequently did.」
　　[　https://www.zum.de/whkmla/sp/0910/hersheys/hersheys5.html 2011-04-05　]　
　「Bound feet were a mark of beauty…. Women, their families, and [her owner] took great pride in tiny feet, with the ideal length, called the 'Golden Lotus,' being about 7 cm (2.75 inches) long. …The process was started before the arch of the foot had a chance to develop fully, usually between the ages of 2 and 5. …Qing Dynasty sex manuals listed 48 different ways of playing with women's bound feet.」
　　[　https://en.wikipedia.org/wiki/Foot_binding 2012-12-17　]　
　「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. …Children are usually described as natural sexual beings and erotic stimulation and sex-play are seen as beneficial to their healthy development.」
　　[　https://docx2.com/wp-content/uploads/Are-Any-of-the-Pharaphilias-in-DSM-Mental-Disorders_.pdf 2023-05-14　]　

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: old; opposite: new 新; former; worn (with age)
Japanese: ex-, former, old, used item, secondhand item, previous, aged, ancient, antiquated, stale, threadbare, outmoded, obsolete article, very old
Unihan extended: old, ancient; former, past
EDRDG: old times; old things; old friend; former; ex-