You are entitled to privacy in a relationship, right?

I certainly believe you are entitled to a part of your life that's your own in a relationship. Not that I've been very successful in relationships myself, but a major issue for me in those I have had was the intrusion into my personal space. I mean things like the other partner listening in to phonecalls, wanting to know who I was talking to and why they were calling, reading my blogs and private letters and things like that. I always respected the privacy of my partners in matters like that and didn't poke my nose into what I felt was their private business. However, it seems that this isn't what many (or most?) people expect in relationships.