Me: Sorry to hear that.
Wife: Can I borrow your flash drive?
Wife: I promise I'll give it back to you before we leave for Seattle (where we were going to facilitate a workshop).
Me: Ok, no problem, here it is.
Wife: I'll hang it around my neck so I don't forget to give it back to you.
Me: Great, thanks.
...Two weeks later, in Seattle, when I had to print some materials for the workshop the following day...
Me: I can't find my flash drive.
Wife: I gave it back to you. I'm sure I gave it back to you. Use dropbox.
Me: Ok, I'll use dropbox.
...Six days later, back home...
Wife (from another room): Oh oh...
Me: What happened?
Wife: Promise you won't get mad at me.
Wife: Say you promise.
Me: Ok, I promise I won't get mad at you.
...You know how the story ends...