Dung Fong But Bai infamously became a she-male after castrating himself to train in the Qwai Fa Bo Deen. His speech, mode of dress, and behavior patterns became decidedly feminine after castration.
My memories of SPW are fuzzy, but I remember that after Ngok But Kwun also castrated himself to train in the Qwai Fa Bo Deen, he didn't act nearly as feminine as Dung Fong But Bai had. I remember that his wife complained about his not being as attentive towards her as he once was, but other than that, he still behaved in his usual, pre-castration masculine manner. Nobody else seemed to really notice any change to him.
Was this the case, and if so, why?