PC has some normal and some bizarre explanations for why she doesn't discuss her personal life. I think one of them is that her family is a bit conservative and wouldn't approve of her doing so. One of the bizarre ones is that she doesn't want her future kids looking up google and finding out stuff about her past relationships. Well that will happen whether she admits to them or not.
I don't really agree with her POV on this subject, but again its up to her to discuss what she wants to discuss in the media, right?
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