I never locked anything when I was married. Found it very difficult to get into the habit here, too. Then thieves robbed 3 houses on election day about 4 years ago, one of the houses was less than 2 miles from my house. They just walked in. And, Jehova Witness peeps left one of their flyers IN my back sliding door! The way they left it, I knew they had opened the door. So, after that, I lock all doors when I leave or go to bed. Joe is retired police officer, he is anal about locking everything! He won't even sleep with windows open in his house. In fact, he would go around and close/lock all windows just to go to the store for 30 minutes. Here, he is ok with it, since no one knows him here (i.e., people he has pissed off during his police career!). Told him in the spring and fall, if I can't have windows open, I would die. LOL