The whole family is in the car coming home from a long day somewhere. Mommy looks back at the kiddies, and notices that E's shoes are on the floor of the car, and not on her feet where they belong (again).
Mommy: "ummm.. why are you shoes on the floor?"
E: "Mommy!" (with this tone of unbelief at my stupidity in not knowing the answer)... "there's dirt in my shoes and so I don't want my feet to get dirty".
Mommy: "uuuuhhhh" (speechless) "ok"