[Saline9515]

It's also linked to the modern trend of having tightly fitted clothing. You don't have this issue with skirts, or wider, pleated pants with a high waistline. Those clothes were the norm before the 60's, since it's much roomier and allows to fit a wide range of body types.

[throwaway2037]

    > It's also linked to the modern trend of having tightly fitted clothing.

Exactly this. If David Foster Wallace were still alive, ten years ago, he would have written an essay titled: "Everyone wears athleisure now."