Why do women scream?

I have often caught myself screaming at all types of situations if they cause me even the most minor inconvenience however i always try to look composed but i instinctively find myself screaming if i am startled or worried something will go south even if someone near me is about to get in a dangerous situation or is about to get hurt i find myself screaming. Is there a biological reason or something or is it just me?
Why do women scream?
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