"DAAADDYYY! I'm thirsty!"

Here is a little story I was told in church Sunday. I thought it was funny, so I will tell it to you.
There was a dad putting his son to bed. "You used the restroom?" "Yes, dad" "Anything else before I leave? Once I'm gone you loose your chance." "Nope." "O.K. Goodnight son." "Goodnight daddy." Then the dad shuts the door and leaves. 5 minutes later "DAAAddYYYY! " , the son yells, " Can you bring me a glass of water! I am thirsty!" "No son. You already had your chance." 5 minutes later "DAAAADDYYYY!", the son yells," Can you bring me a glass of water! I am thirsty!" "No son! I gave you a chance and you didn't use it! Ask me one more time and I will come in there and give you a spanking!" 2minutes later "DAAADDYYY! When you come in here to give me a spanking, can you bring me a glass of water! I am thirsty!"