"Take your brother to see a movie for his birthday. Keep him out until 2:00 while your father and I set up his surprise party."
That was the day I realized my brother was the favourite twin.
EDIT: I translated the joke from another language, but then dug out [this](http://i.imgur.com/BNx13aq.jpg) which may well be the original. So, credit where credit is due.
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