OH OH OH!!! I know!! it's when a kitty steals a lick of your peanut butter sandwich when you aren't looking, and the proof is undeniable because they are there licking their mouth for ten minutes!
Clover did that once... and didn't move for like.. half an hour until she was absolutely sure that all the peanut butter was gone from her mouth. Though it was good lunch entertainment for me, at her expence o.O

Such handsome boys! If they ever get lonely I know of some lovely girls to keep them company :P