} The Oracle has pondered deeply upon your question.
} We have determined that girlfriends do not fall under the restrictions
} of quantum physics and are thus completely unpredictable, save of course
} by the use of an improbability generator.
} The most probable cause of your girlfriend leaving,
} probability = .203451, is a declining interest in either:
} the color of hair on your left forearm,
} the curl of your eyelashes,
} Earl Grey tea,
} the size of your right big toe,
} the non-relevance of the Beatles
} ("Music is irrelevant. Resistance is futile."),
} the lack of cool dark shades,
} or the price of Limburger cheese.
} The next runner-up, with a probability of .054927, is the opening of a
} Klein-bottle shaped rift in the spacetime continuum within 7.3 coulombs/
} second of her body while she was thinking of kumquats.
} As payment, you owe the Oracle: 1 hot cup of tea, 1 Beatles album (tape
} or CD), 5 tons of flax. Thank you.