Would you say animation is becoming more prudish? Outside of a few adult oriented cartoons, it's nowhere to be seen, and even in those it's often played for laughs than actually showcasing eroticism. Even something as silly as "booty quake it" is so rare that people went bonkers over it.
Shit like Game of Thrones is in popular culture, yet overall, late 70s, 80s and early 90's had the most skin and eroticism in their pop culture in animation and cinema. Even something like Baywatch would simply not fly nowadays, and you will never see boobs in a comedy unless it's a retarded "teenagers try to lose their virginity" film.
