They Go To An All-night Emergency Waiting Room Run By Dr.

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They go to an all-night emergency waiting room run by Dr. Nick, they ask Smithers if they can go ahead of him. He replies, "Uh no, I'd really rather get this taken care of." He's standing up, while everyone else is sitting which I believe to be a very subtle reference to the legendary problem gay men supposedly come to emergency rooms with, namely having a foreign object in his anus he is unable to remove.
Episode: When Lisa babysits for Bart

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