Two farmers are fighting over their donkeys.
They can’t tell the donkeys apart so the first farmer says
“I’ll colour the tail of my donkey off so that we can tell.”
A few days later the donkeys get into a fight and the other donkey gets its tail bitten off.
The other farmer says “I’ll colour my donkey’s ear off so I know it’s mine.”
Then the next day the donkeys fight again and the other one loses an ear.
Then the first farmer says “I’ll put a collar around my donkey”
The donkeys get into a fight again and the folder comes off.
Then finally the first farmer says
“I’ll tell you what, you take the white one and I’ll take the black one.”
The second farmer responds:
We should probably keep this gate closed too.