The husband and wife are pulling the rope attached to the donkey in opposite directions. Everyone can see this, but not everyone can figure out where the donkey is in the picture.
The idiom “stubborn as a mule” describes a person who is unreasonably obstinate and hard to persuade. It comes from the fact that donkeys are known for being independent and strong – willed. They’re famous for resisting control and often refuse to do things they don’t want to.
Historically, donkeys were used as pack animals. Their stubbornness was both an advantage and a drawback. Their independence made them good for working in tough terrains, but it also made them hard to manage. The phrase “stubborn as a mule” was coined to describe uncooperative people, much like stubborn donkeys.
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