A Drink of Water

 A small boy is sent to bed by his father.
 Five minutes later, "Da-ad..." 
 "What?"
 "I'm thirsty. Can you bring me a drink of water?"
 "No. You had your chance. Lights out."
 Five minutes later, "Da-aaaad..."
 "WHAT?" 
 "I'm THIRSTY...Can I have a drink of water??"
 "I told you NO! If you ask again I'll have to spank you!!"
 Five minutes later... "Daaaa-aaaad..."
 "WHAT??!!"
 "When you come in to spank me, can you bring me a drink of water?"