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It is true that women can get wet when they are being raped. But it's a response from fear, happens to men too, they can get erect. Also with women it can happen after forced penetration because the body is trying to protect itself from damage. Like it's just literally trying to keep its self from being torn up on the inside by producing lubrication.
Of course manga are shit at showing that that's what is happening. They just do the "Oh my boob got touched so now I'm wet!" And conveniently most women in these stories have a freeze response to fear instead of a fight response to fear. At least this protag had a fight response. Like yes both responses are valid in real life, who are any of us to judge what someone does when they are scared and being assulted. But it is telling that most writers choose the freeze response for their protags.
For once where the FL is not getting wet from a rape scene. I read so much wher da FL is like "Im being rape but it feel good that Im wet." Like are you fking serious?? At least this FL is like "Im being rape but Im feeling it but im not gna be wet for you fk that"