Seegee:
So should the reverse apply if the male is the transgressor? Being corporally punished on his bottom by a woman.
Ahhhh, I'd venture that would be "objectively fair," but in numerous Library story scenarios it might not be considered "subjectively right." One gender being the one which is primarily--or even exclusively--subject to corporal correction, often primarily--or even exclusively--by members of the other one, that's hardly unusual in stories or serials in this Library.
It might be simply within a single family, or a group of families, or a particular institution (educational and/or punitive), or even an entire society.
Then it again, it might simply be within a two-person relationship, in which one is always the spanker and the other one always the spankee, because that's the disciplinary (and/or erotic) dynamic between the pair.
KD (Pierre) may have been too modest to 'plug' his own writing, but numerous stories of his explore that type of relationship (most of them within a F/M orientation), not merely including it but focusing on it. The comments on them also show a 'split' between readers who object to the relationship being generally "unfair" in the sense of it being one-sided, and others who accept it as "right," even though one-sided, for the two individuals involved in it.
Potential spoilers:
I recall "Crushed" as being one of those stories which drew quite a few comments suggesting an alternative outcome, even though both of the youthful participants in the entirely one-way disciplinary relationship had come to accept it by the story's conclusion--in fact it was the male spankee who insisted that there be no exception made to their spanking dynamic, in spite of him feeling somewhat mistreated by the spanker at the time, with her having offered to accept a walloping from him. (They were siblings, not romantic partners.)
In "The Friend," the male spankee, while doing pre-punitive cornertime, pondered the reasons that his friendship with his female spanker, originally a close but 'vanilla' one, had developed a strong one-way disciplinary aspect, even though he could logically find no reason for him to accept her dominance over him (she was his 'keyholder' as well), except that--as he told himself afterward, having been returned to the corner with his bottom blazing--"she knew which side of a hairbrush they each belonged on." (I likely remembered this one especially, since it involved platonic opposite-gender friends rather than lovers.)
In most cases, I'd agree that "objective fairness" would be the same as "subjective rightness," but I also accept that there are relationship dynamics (romantic/sexual or otherwise) in which it's not, even if it would superficially seem that the spanker and spankee should be equals in their relationship. (In another of KD's stories, "Pride," a woman deliberately 'unequalized' the dynamic between her husband and a girlfriend of hers, in order to make it harmonious rather than contentious.)
This is an intriguing subject, but now I'm going to reread some story comments before taking it any further...

--C.K.
[P.S.: I'm a practicing spankee (albeit for marital play rather than serious discipline), although the frequency of my spousal spankings varies considerably at different times due to numerous factors, and obviously I both read and write spanking-oriented fiction.]