Arf at the faux surprise people actually wear them
Big bums are in, they have been for a while. Ergo women (some) want to accentuate their arse and make it look big and defined
It’s no different to wonderbras in the 90s and women pushing up and accentuating their tits
Ive no doubt women in the 1800s were showing off and accentuating their ankles or wrists or whatever was hot then