They made a whole movie about this. My wife and I had the amusing task of learning all kinds of obscure facts about each other ahead of my interview, since we

They made a whole movie about this. My wife and I had the amusing task of learning all kinds of obscure facts about each other ahead of my interview, since we had seen the movie and knew they would ask about which end of the toothpaste tube the other squeezes... But in the end the person conducting the interview seemed to have seen the movie too and determined that we were bickering sufficiently about our answers to prove the marriage was legit ;)