Husband: "Ummm. No?"
Me: "I'm sitting outside the house, and - where is my door key? Is it still in your pocket?"
Husband: "No! Absolutely not!"
Me: "Well, I don't have it. Can you just check?"
Husband: "I gave it back to you."
Me: "When?"
Husband: "Before we left. You asked me for it, I went upstairs and called down that I found it."
Me: "I know. And then I called up that when you came out you should lock the door with it, and that I was going to put the boys in the car, start it and wait for you."
Husband: "No, that's not what happened. I gave you the key and then you said I should lock the door and I had to go upstairs and look for mine because I had given you yours and... I definitely gave it to you."
Me: "I don't remember that. Did that happen? Are you sure?"
Husband: "Yes, it happened!"
Me: "Well, I don't have my key, so can you just look in your coat pocket. Please?"
Silence for around 30 seconds. Then...
Husband: "I have your key."
Me (unable to keep this frankly unhelpful comment to myself): "You do know that the second part of that conversation took place entirely in your head, don't you?"
Note: I, of course, am a saint in human form and this conversation never takes place in reverse. Never, I tell you...