Why do some women act territorial over their friends? I have never seen guys claim one best friend, Is this more of a female thing?

ikissedtheskyonce
I know some women are joking when they say certain things but I have seen some women act territorial towards other women (not me) in real life and on facebook over their best friend.

And some act like a person can not have more than 1 best friend?
Why do some women act territorial over their friends? I have never seen guys claim one best friend, Is this more of a female thing?
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