One Early morning a mother went to her sleeping son and tried to wake him up.

Mother : "Wake up, dear son. It's time to go to school."

Son : "But why, Mom? I don't want to go to school."

Mother : "Son, Give me two reasons why you don't want to go to school."

Son : "One, because all the children hate me. Two, all the teachers too hate me."

Mother : "Oh! that's not sufficient  reason. Come on, you have to go to school."

Son : "Give me two good reasons for WHY I must go to school?"

Mother : "One, you are FIFTY-FIVE years old and should understand your responsibilities. Two, because you are the PRINCIPAL of the school