There is a story that our grandmother says when I was little. Yaks and buffaloes were (both girls) friends and they were both hairy. They used to graze together in the fields and jungles. Once they were not able to find salt.
The yak said "let me go to the Himalayas, I hear that there is salt mines on the mountains."
The buffalo said "but I hear, it's very cold in Himalayas."
The yak replied "give me your coat, when I will come back I will return your coat."
The buffalo agreed and she gave her friend her fine coat. Sadly the yak has yet not returned from the Himalayas. That's why the buffalo often looks up, to see if the yak is returning and the yak looks down to see if her friend is still waiting.
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Both pics are from internet.