An interesting idea that I heard from a friend last Shabbos:
I was talking about the difference between the Arabs’ view of “tznius” and the Jewish view of tznius. Even though the Arabs seem to be very tznius in terms of dress and actions, it actually has nothing to do with our concept of tznius. By us it’s about כבוד האשה and by them it’s about demeaning women.
My friend pointed out that we don’t cover our faces – demonstrating that we are not covering up the person (since the face is the person – פנים מל’ פנימיות
(source: Lilmod’s friend)