「Elder brother with emissions and gonorrhea」as a TOLL, UNDISCLOSED PRICE PAID LATER, TAXING likely needs no further explanation.「Emissions with orifice of hairless brothel runt, very young apprenticing prostitute」also speaks for itself.
　Perhaps「grain plants」and「business transactions」identify one kind of business transaction being referred to as a serf paying one's TAXES with grain that figuratively becomes the「grain that was taken by coital actions, shafting」from the farming serfs 'getting screwed' as it were by feudal lords, to mean TAXES. The initial「grain exchange and business transaction」was to pay TAXES to your lord, DUTIES for using the land, and the taxes were paid with the year's new grain harvest. If any grain remained after the lord took his cut, then one's family might not starve.
　「Achieving harmony with copulation emissions」describes cooperation among the brothel proprietresses and local administrative arms of the government / brute squad / gang of extortioners to PAY AND COLLECT EXCISE TAXES, respectively, in order to share the wealth among all the powers that be that was gained from child sex slave rentals in dynastic China. Entry TOLLS were paid at the inspection gateways, in addition to other taxes.
　Long ago, grain was used in poultices as an agent for drawing pus from an infected tissue site. Still works today for that purpose, although grain-filled poultices are a bit messier than pharmacologically manufactured unguents, so you just don't see them used as often anymore outside of bushman regions: infected tissue sites are an UNDISCLOSED COST PAID LATER, a TOLL paid down the road, not an「up front」ante collected in cash at the gateway upon passing inspection and paying the entry fee.
　Nevertheless,「seeds at stalk tip with trading fluids, emissions with orifice copulation」also describe a TAX. In dynastic China, there were also forms of what today are referred to as 'sin taxes' levied at the gateways into the red-lined zones and brothel districts. If not always formal excise taxes, then fees and/or bribes needed to enter when the laws and regulations otherwise would have excluded a client (see 閲).
　And finally, the「gonorrhea barter」with elements as「stalk tip fluid exchange while schtupping (ejaculation into a birth canal or other attainable orifice), bartering a business trade, trading emissions due to orifice copulation, involuntarily spurting elder brother」the inevitable PAYMENT OF A TAX, a TAXING situation develops in most cases with a taxing death being paid as the unavoidable outcome: death and taxes, for whom the bell TOLLS. Remember that「you get what you pay for.」…or paraphrasing that famous quotation of John J. Arbuckle,「you'll get it when you pay for it」may have been closer to what the Chinese sages had in mind: see the glyph 安 meaning 'safe, easy, inexpensive' (all three at once) employing elements of a 'female under one's own roof' as perhaps the antithesis of TAXING, paying a TOLL.

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: taxes; duties
Japanese: tax
Unihan extended: taxes
EDRDG: tax; duty

Used within names (nanori)
さい