Leonard: Whatever, Sheldon. I'm exhausted. I'm not taking you to the dentist.
Sheldon: Wrong, sir. Wrong. Under section 37B of the roommate agreement, miscellaneous duties, you are obligated to take me to the dentist. See? It's right here after providing a confirmation sniff on questionable dairy products.
Leonard: You know what, I am sick of the roommate agreement. It's ridiculous. I'm your roommate, not your chauffeur. You know, I had better things to do yesterday than drive you all the way to the good model train store in Garden Grove because the one in Pasadena has gotten too big for its britches.
Sheldon: Well, it has. Ask anybody.