>>21521560We understand the human body and nutrition a whole better, so it's easier for women to sculpt themselves into the size and shape they want, which has historically tended to be the exaggerated hourglass shape.
Even back in the day though you could find women with large assets, especially if they put in the work to sculpt themselves. And if you think it's "this century", try looking up Ruben's Venuses, or the Venus of Wittenheim.
Big tits and ass have been peak female sexual symbols literally since man first got his dick in a woman. It's just that nowadays women understand much better how to get them or look like they've got them.