It's either horrid or a broken machine translation to English.
> The best illustration of “spillover” is the incredible increase in the size of the ass and thighs in girls. This is not due to squatting or implants, because you see it at very young ages.
I do not disagree, but there is a way to notice it and comment on it that has far less probability of being considered "creepy" by someone reading. The author is of course free to do as they please, doesn't make their point any more right or wrong.