Glass of water

One night a father has sent his son upstair to bed for sleep.
Five minutes later, the boy screamed..

"Dad!can you get me a glass of water?!?"

"No, you had your chance. be quiet and go to sleep."

A minute later the boy screamed

"Dad, can you PLEASE get me a glass of water?"

"No, you had your chance. Next time you ask,
i'll come up there and spank you."

A minute later the boy yelled..

"Dad, when you come up to spank me,
can you bring me a glass of water?"