It reminds me of the last era, 1900 onwards.
Legs of women were seen as extremely attractive, but also very indecent if shown in public - breasts were never really shown, and even in a relationship - most couples in that era were extremely modest in sexual intercourse and clothing themselves during the said act.
My point im attempting to convey is that it's a social construct largely, legs were the forbidden fruit in the 19xx era until women were legislated iirc to be allowed to wear shorts or the like and nowadays it's breasts.
I'm probably not speaking clearly, but i am tired