「Next in sequence with female」「female with inferior quality, substandard」describes a competition, a BEAUTY COMPARISON among concubines to win the attention of the lord by using GUISE, and how the harem members may have felt about one another in some cases, as a「cold and damaged female.」
　Conversely, after the previous female learns the truth of one's「dripping deficiency with a female」something is needed as a GUISE, a false appearance with the intention of deceiving, using pretense to disguise one's true condition of a sexually transmissible「dripping deficiency and head danger with taut erection」infection or virus picked up from a previous encounter (that is, now being with the「female next in the sequence」), using the OUTWARD APPEARANCE, FORM, SHAPE either to deceive her and get laid again or deceive him and get paid again, perhaps passing on the infection. Likely the meaning behind the English proverb:「beauty is only skin deep」because deeper in the meat one may find syphilitic corkscrew demons, gonorrheal gleet pus and blood, and so on…so learn to look beyond the skin and OUTWARD APPEARANCE, FORM, SHAPE, past the DISGUISES at the true condition of the soul meat (sniffing is good, too, so trust your nose): symptoms are usually obvious enough that they will cause a man to seek medical treatment before complications occur. Some men have mild or no symptoms and can unknowingly transmit gonorrhea infections to their sex partners.
　　[　https://www.webmd.com/sexual-conditions/do-i-have-gonorrhea　2023-05-18　]　…And some women, too as the two World War army posters warned.
　A less likely explanation, but perhaps「two gaping at female」or「two deficient females」are two people gawking like geeks (but, why two?), or being「frozen」in one's tracks at the FORM, FIGURE, SHAPE, APPEARANCE of a person, not limited to males gaping by the way, that suggest one extreme or the other of a DEGREE OF BEAUTY or lack thereof, with both extremes likely to cause folks to stop and gawk, freezing into an unmoving POSE. Obviously, the POSE the watched male or female is assuming may also be a reason to gawk…. It seems that at one time or another, most everybody thinks about the「next woman」jealously as in someone else always looks better than I/you do, or, may be fantasizing about the next woman while believing one's mate is a「deficient female」and so on, but after all is said and done,「everybody's next one」is just another GUISE with a false appearance using pretense and posturing.

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: beauty; disposition; looks; appearance
Japanese: figure, form, shape, appearance, dress, guise, state, condition, picture, image, dressed in …, wearing …
Unihan extended: one's manner, carriage, bearing
EDRDG: figure; form; shape

Used within names (nanori)
しな