Profanity – especially delivered by women – is a powerful way to transgress the red lines of politeness and niceness that the patriarchy – shared by the rock and the hard place – demands of us as women. I say fuck because I am not supposed
Women swearing is considered rude for fear that it strips off their elegance and submissiveness.
Even in an environment where it feels "acceptable", there's the invisible line that somehow reminds them not "to do it too much". Again, for the same fear of losing the docile feminity.