When I'm going out, for whatever reason, Fidelio knows where I'm going (or at least a general idea) and when I'm expecting to be home. He does the same for me when he leaves the house.
We do this out of respect, love and consideration for one another, not out of a desire to control one another.
There are also solid practical reasons to know where one's partner is. Several times in the years we've been together, he's found me in a broken down vehicle because he knew where to start looking. (Cell service is spotty where we live, and cars never seem to break down where the signal is strong.)