How do I talk to men without acting fake or changing who I am?

Is there any secrets how you should talk with men?
Like you should do certain voice and act stupid or something? Be positive and kind? I don’t know how to do it.
And I know that you shouldn’t talk about your past etc, it’s hard for me cause I’m open book, and also I’m super negative.
How do I talk to men without acting fake or changing who I am?
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