I just wanted to mention, that the actual B&W halachos of tznius are few and far between. Most of it is hergush – personal feelings. For examlple, find me the halacha that one should not call a strange person of the opposite gender by their first name. You wont find it. Most People wont do it. Why not? Because it doesnt feel right. it creates familiarity
Most “harchokos” are as a seyog to avoid problems, as are a lot of hilchos Tznius.
Well said.