Teacher asks the student:
"What is your aim in life?"
"To become a psychiatrist", the student replies.
"Very good", the teacher says, "Now would you please spell the word psychiatrist."
After some hesitation the student replies: "Well, I mean I want to be a doctor, sir. D-O-C-T-O-R."
A cat will clean itself with paw and tongue after a dangerous experience or when it has fought with another cat. This is an attempt by the animal to soothe its nerves by doing something natural and instinctive.