In a nutshell:

Jim: "Obama; your stance on your current thirst..."

Obama: "I would like to drink a cup of orange juice, then clean out my cup and put it in the drainboard."

McCain: "See, there's another thing that Senator Obama doesn't understand; you can't drink the whole bottle of orange juice without causing problems for other juice drinkers in the house. I remember when I was in prison, I had to share rations with the men that were being held with me. We weren't given much food, but I was generous and understanding, and I have a history of sharing my rations. I have experience in sharing orange juice."

Obama: "I'm sorry John; No one was talking about drinking the whole bottle...
Jim, you have another question?"