>>279892972
In character design, round shapes are often used to show a friendly and compassionate side. It's why most mascots and kids characters are made of them. Most Anons seem to be some kind of neurotic and we have a culture of "judge and be judged." I also read years ago that economic pressure can make men prefer curvier women. I'm not surprised that this would affect /a/'s taste in waifus. It's probably why so meany here also like amazons and tomboys.
Furthermore, anime idealizes the fatty to look more like a plush toy then a real land whale.