How is being quiet/shy bad in a relationship? why is it bad for a girlfriend to be quiet?

Let’s say she talks whole convo but just is quiet , not loud , yelling, chatting with all your friends.

what is so bad about a quiet girl? Why that would make someone not want make her his girlfriend?
just cuz a girl is quiet don’t mean she won’t have sex. Sex has nothing to do weather a girl will have sex or not. Quiet girls love sex

How is being quiet/shy bad in a relationship? why is it bad for a girlfriend to be quiet?
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