I've learned to use this to my advantage, see following example:
Me: "C. you've got a black booger hanging out of your nose, let me get it."
C: "No."
Me: "Oh, Barbie doesn't have black boogers hanging out of her nose."
C: Obediently leans nose toward me to have the offending booger removed. Doesn't say a word. Doesn't complain. Doesn't shout, scream, pull away or otherwise misbehave. After booger is removed she asks to see it.
I realize this is manipulation and I sincerely hope to someday be the kind of mother who has children who obey her immediately and at all times. Until then - man, I love Barbie.
* Yes, I know I revealed it.