Halacha codified it from a pasuk assuming married woman cover their hair from sotah. Please. It’s not a “commandment” it was taken from a pasuk. There are a lot of actual commandments like do not steal do not kill. It says _nowhere_ thou shall cover your hair. please.
Modesty is in behaviour and dress but woman like attention and like to look pretty maybe they don’t really like their husbands or maybe, woman by nature dress more beautiful after marriage because men by nature appreciate that their married to attractive woman.
