Which is why it became very, very popular in America. Teenagers figured out mom and dad would look at something and see cartoons and not think: gee, there might be full frontal nudity in this.
It didn't work for long, but it worked. And now it's a cliche. I literally wrote a book on this subject called How to Be An Anime Character you can find on Amazon. Anime characters having large gravity defying breasts is right up there with with how they have 50 gallons of blood and sweat in their bodies, death's revolving door policy, the way that pink haired girl will try to murder you and apologize later, or can scream loud enough to be heard in space.
https://www.amazon.com/How-Anime-Character-Clayton-Overstreet/dp/1441451803