Does anyone have any brain teasers~jokes?

One night, a cow and a sheep were playing together. When they were tired from playing, they felt hungry, so the cow told the sheep to go eat, and the sheep agreed. The two of them went to the entrance of a 24-hour supermarket together.

The sheep said: "Niu, you go in and buy something to eat. I will wait for you outside."

The cow. Said: "Yeah, okay!"

Then the cow came out of the supermarket, covered in injuries.

The sheep asked worriedly: "Cow, what's wrong with you?"

The cow sobbed and said, "I was beaten by someone in the supermarket. I can't buy any more. You go ahead."

The sheep nodded and went in. But after a while, the sheep came out safe and sound, and carried a lot of delicious food in their hands. At this time, the cow was very confused.

The cow asked: "Why didn't they hit you?"

Does anyone know what's going on? That is...24-hour specialty store, never closed (sheep)