The Weasel and the File

There was a weasel who ran into a blacksmith's shop, and she was intrigued by the large iron file. "That looks like a snake I can eat!" she thought.
As she licked, the rough file made her tongue to bleed. The taste of blood made her lick harder, and that made her tongue bleed even more. The weasel thought the blood came from the file, and she kept on greedily licking the file until her tongue was almost entirely worn away.
The moral of the story is that those who indulge their greedy will end up doing harm to themselves.

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Inspired by: Mille Fabulae et Una, a collection of Latin fables that I've edited, free to read online. I am not translating the Latin here; instead, I am just telling a 100-word version of the fable.
Notes: This is fable 194 in the book, which is Perry 59.

(Medici Aesop)