Why so many girls are trying to pull down other girls?

Girls in my office always refer to elderly unmarried girls as "leftover women" - as if they are some commodities.
There is another girl for whom they say "if women were a prize, she will be a consololation award".
Is there honour among women?
What happened to the sisterhood code?
If nature made you beautiful, you should look out for the less fortunate.
If girls treat other girls this way, guys will approach us as "use and throw" objects.
Why so many girls are trying to pull down other girls?
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