Dehydrated Boy

A boy was in bed dehydrated, so he decided to ask his father in the sitting room to get him some water

Boy:    Dad, can you get me some water please.
Father: No! Go to sleep.
Boy:    But am thirsty, please just a cup
Father: Not another word from you or I will come in there and spank you!
Boy:    Dad!
Father: [Frustrated] Yes!
Boy:    While you're coming to spank me could you bring the water.