Maybe you have never, ever shown anyone anything you have written. Maybe you have a trusted friend or family member or two who you feel comfortable sharing it with. Maybe you love to read aloud, and show people what you are working on. Maybe you never show your first draft, but after you revise and polish a piece, you enjoy sharing it.
There's no right or wrong level of privacy for a writer. It just depends on what makes you comfortable.
How about you? Do you keep your writing a careful secret? Do you like to share?