It’s pretty clear to me that the trope that (some of) the fanfic folks call “dub-con” (“dubious consent”) is pretty common in Japanese popular culture, especially romance-type manga and anime, where it often appears in comedic contexts.
https://fanlore.org/wiki/Dub-con
(Please, all the arguments, and then some, about the relationship between real-life and fictional consent/coercion can be found at the above link; there’s no need to rehash them here.)
Speaking here only of fictional contexts, it makes a kind of sense that in certain situations, including ones where cultural norms and assumptions militate against the expression of forbidden desires, characters would unconsciously yearn to be (or at least accept being) “forced” or “coerced” into doing something that is ordinarily taboo.
The big difference between fiction and real-life, of course, is that authors can give us access to the thoughts, feelings, and desires of all the characters, establishing their motivations and reactions. That’s why (to me) the arguments that “if this were real life, such-and-such action would be [some version of Not OK/criminal/abusive, etc.],” while often quite true, are of limited use in analyzing fictional narratives.
(Again, see the link above for the discussion of why “dub-con” is not (repeat: not) a useful concept when applied to real-life).