"Thirsty" joke

A small boy is sent to bed by his father. Five minutes later....

"Da-ad...."

"What?"

"I'm thirsty. Can you bring 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 a drink of water?"