SWMBO (staring at me whilst I am driving family to the park): Have you got a mark on your chin?
Me: No.
Sprog #4 (with the wisdom of her three whole years' experience): You need to do your thingy.
Me: What, sproglet?
Sprog #4: You need to take your face off.
Me: WHAT did you say?
Sprog #4: You..need..to..take..your..face..off.
Me: What!?
Sprog #4 (with a little translation by elder sprog): You need to shave.
Cue laughter.