8 XXX : stockings

I grew up in the early 90's, and the most baffling change I have seen over the years, is the "modern female physique". I think of all the Playboy's and Penthouse I used to read, compared to the modern "eGirl". How has boobs stayed small but asses have gotten so huge? Thicc thighs and crazy hourglass figures are everywhere now, and I can't help wonder HOW.