To Lock Or Unlock?

When in a relationship is it okay too keep your phone locked? Some people tend to think that if you keep your phone locked it means that you have something too hide. It doesn't necessarily mean that they are hiding something. Some people are just private people and don't wish too share everything with their partner. I myself have been guilty of snooping through my mans phone, and it wasn't until recently that i realized there was no need. We all know that whats done in the dark always come to light so why bother snooping?.  Sometimes our curiosity and or insecurities can get the best of us.