You are entitled to all the privacy (you) want. No one is forced to stay with someone who violates their boundaries. Some people are completely candid about their lives and share debit card PIN#s, Email passwords, Facebook and other log on passwords with their significant others. Other folks would rather hold onto their privacy and share only those things they choose to share. There is no "right" or "wrong", only agree or disagree. Ultimately you are better off being with someone that feels the same way about it as you do!
Anyone who approaches life with a "I have nothing to hide" or "My life is an open book!" philosophy will always be suspicous of those who recoil at the idea of sharing everything. There are also others who are afraid of being hurt or betrayed so they take it upon themselves to in the words of Ronald Reagan "Trust, but (verify)" especially early on in a relationship.
Even the most trusting person in the world would raise an eyebrow if their mate whispered during phone calls or took calls in another room, changed screens on their PC whenenver you walked towards them or suddendly displayed erractic behavior. It takes courage to fall in love. Trust like Respect is something to be earned over time. In order to be trusted one must demostrate honesty and integrity.