A great analogy of the UN's relationship with the US is the one of the spoiled teen, lashing out at the parents:
UN: "Yeah, well me and my friends had a vote, and we all hate you guys! You're not the boss of me!"
US: "We are the boss of you live under our roof"
UN: "Fine then... I'm LEAVING!"
US: "Great. Don't forget we're cutting your allowance to zero"
UN: "You can't dooooooooooooooooo that!!!"
