Breaking Boundaries

This morning the unspeakable happened-before I could stop it Dave opened the door while I was in the..umm.. bathroom (I'm a prude so I'm not going to go into details, use your imagination..well actually please don't).  Our eyes locked for a brief second before I shrieked and slammed the door in his face. 
I'm a firm believer in boundaries and all relationships should have them.  Mine happens to be a white partial board door, for me it is the divider between a healthy relationship and one where you can't look your partner in the eyes.  A shut bathroom door shouldn't need explanation and unless I am a heart surgeon with a critical patient, Hedi Klum's divorce lawyer or in the middle of a big business merger no one should EVER burst in.  I don't believe in even knocking on the door and asking questions-this isn't facebook, you don't need a status update.  The McRoberts kingdom will not collapse while the queen is on her throne.  If the door is shut I'm busy and it can wait thankyouverymuch.
Now I obviously have to remember to lock the doors every time or maybe I should just implement a sign system like below:

Yes, that will do nicely.

FML if this post goes viral.