Why do some women still call their fathers "daddy"?

I find it strange how some grown women or even older teen girls choose to call their fathers daddy. If it's a cultural thing, then I don't mind it. However, I've watched movies/shows where women would do this, and I just don't find it that cute at all even if they're labeled to be a "daddy's girl."

Why do some women still call their fathers "daddy"?
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