Women hate bugs. Even the strong-willed ones need a man around when there's a spider or a wasp involved. Women can't keep secrets. They eat away at them from the inside. And they don't view it as being untrustworthy, providing they only tell two or three people.
Women always go to public restrooms in groups.
It gives them a chance to gossip. Women can't refuse to answer a ringing phone, no matter what she's doing. It might be the lottery calling. Women never understand why men love toys. Women think all beer is the same.