Benignuman: Have you a source for your statement that Histaklus = Hirhur? I would have thought its possible to be mistakel without hirhur and vice versa?
An indication would be that they are learnt from 2 different pesukim.
Histaklus is learnt from ‘Lo sosuru acharei..veacharei eyneichem’ which Chazal darshen (see Rashi) as ‘Znus’.
Hirhur on the other hand is learnt out from ‘Vnishmartem mikol davar ra’ in this weeks parsha (Ki Seitzei.
Hence my original question; l’chora the Issur Torah of Histaklus should only apply to women with whom there is an Issur Torah of Znus – and possibly only an Ervah. (That’s why its known as Histaklus B’Aarayos’) – so why does it apply to non-Jewish women (which according to some shittos are not even Ossur min Hatorah)?