Every morning she leaves the house, locks the door, gets into the car, starts the engine, and then – simply has to do it – gets back out of the car, leaves the engine running and the door open, while she nips 20 yards back down the street to double check the front door was locked.
I do a lower grade version of this, when either going for a ride or going for a long trip away from the house. I have to check we’ve got everything, and that everything is switched off or locked up 2 or 3 times over.
Drives my family mad, however my justification is that a few wasted minutes is well invested compared to getting to the far away destination only to have forgotten key things or have the house burgled or burn down or whatever.
Also, the family’s approach to preparation generally tends to be to half think about, rush around last minute and forget a load of stuff.