Privacy is a sign of respect and trust, I'm not inclined to give in to the idea that being married or having labelled
as partners would justify the fact that privacy should be transparent and accessible to both. It's not a trust issue
rather a personal one, reasons like one shouldn't hide stuff and things from one another is a sham, that causes
problems and insecurities however one may put it. Privacy is one's solitude. It's solemn and healthy in some aspects.  
It might work with others for who knows how long but for some it just simply won't fit.
If you trust and love one another then you should know how important privacy is with each and everyone.
But if your the type that's open to the idea of open access to everything, I respect that and I wish you luck.