Why do women always assume the worst with guys and never investigated further to see if their assumptions are correct?

This is something women do that makes dating incredibly difficult for men. Like men ask for ur Snapchat instead of ur number and u assume they just want sex. Men come on too strong u assume they just want sex. Men text u too much u assume they just want sex. Men don’t text u enough u assume they just want sex. Men talk to multiple women in the same night and u assume they just want sex. Men make 1 wrong move and u just assume all they want is sex without ever investigating further. It’s like a guy has to have perfect social skills that specifically are tailored to u in order to even get a date out of u. I don’t think women even realize how ridiculously picky they are most of the time.
Why do women always assume the worst with guys and never investigated further to see if their assumptions are correct?
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