Right element is「reaming two seed shafts concurrently」meaning to「do two at the same time, unable.」Nevertheless, it is highly unlikely that a serf woman holding two grain stalks would so HATE, DETEST holding them, or be naturally UNWILLING to try it as so DISAGREEABLE. One interpretation is a「female with hesitation, two shafts concurrently」to mean RELUCTANT, GRUDGINGLY provide sexual services to two shafts simultaneously, or to clients who are obviously infected…remember, we're talking professionals here, and not the average girl gone wild who just wants to have fun.
Possibly「two in authority, both being female」or「female and beyond her ability」as other situations of poor quality for all concerned, generally (only one at a time can be in charge).
Not likely meaning「two females concurrently」as some have suggested, since this situation historically has simply not been much of a problem for humans as everyone can find something to enjoy, but「one female among two seed shafts」has caused some rancor at times in the past between the two males, at least.
In a recently conducted survey of fourth graders, in the section entitled Vocational Aspirations, not a single female responded with「cocksucking prostitute」as among her top three career choices (it should be pointed out however, that「pole dancer」did receive some statistically insignificant responses, about as many as for the boys…follow-up questions determined that the males had generally misunderstood that response as being equated with a「public park flasher」). Actually, not many people nowadays choose to become a prostitute although it has been a common and respected profession historically (perhaps the most common profession among humanity so far). Given the opportunity, most would prefer a different life, and not necessarily being the go-zillionaire CEO of a multi-national corporation with a mid-eight-figure compensation package and stock options, either. Nevertheless, working as a sex slave is often HATED, DETESTED, performed RELUCTANTLY, GRUDGINGLY. Working with gleet shaft after shaft after shaft is generally DISAGREEABLE for everybody.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: to dislike; suspicion; resentment; enmity; abbr. for 嫌犯 , criminal suspect
Japanese EDRDG: dislike, detest, hate
Unihan extended: hate, detest; suspect; criticize