Doggy tail

A man took his dog to the vet and asked him to cut off the dog's tail.
"Why do you want to do that?" asked the vet. "His tail is perfectly healthy"
"I know," said the man. "But my wife's mother is arriving tomorrow,
"Why do you want to do that?" asked the vet. "His tail is perfectly healthy"
"I know," said the man. "But my wife's mother is arriving tomorrow,
Spoiler: