Weston: Mom, why do you lock the door when we leave, but if daddy is home you don't lock it?
Mom: We lock the door to keep out bad guys. If daddy is home, he can beat up the bad guys.
Weston: *swells with pride* yeah!

A week later, while leaving daddy at home:
Weston: Don't forget to leave the door open so daddy can get the bad guys.

A week later, daddy isn't home:
Weston: Mommy, I don't see any bad guys. Would you leave the door open?
Mom: Sorry bud, I just don't trust George's ability to fight the bad guys.
Weston: *disappointed* aww