Tradition, mostly. Or trends. Fashion is an odd thing, but essentially, those styles are either the ones most in vogue at the moment or classic ones that have been determined to be the best-looking on furfrou for generations, much like how the pixie cut has been in and out of fashion for humans, but the bob is ever-present … and shaggy and wavy is perhaps the most attractive of all.
[[Keep telling yourself that, Bill. —LH]]