Two blondes buy a mouse each. Arrived at home, one of them said:
- I'll cut the tail of my mouse so that we can recognize them.
During the night the mouse with one less tail is jealous and nibbles the tail of the other mouse. While getting up one of the blondes notices that the mice are again identical and says:
- I'll cut a paw to my mouse to recognize them.
During the night, the same thing between the mice, this happens until the mice no longer have legs or tail. Suddenly, one of the blondes has an idea:
- We have to say that yours is gray and mine is white!