Well, firstly it was a Sunday - which always puts people in a good mood. But why was it such a good time for humanity? well on that day one of the Great Elder Gods whispered into the ears of a relatively unknown farmer. The words were themselves appeared in a dream as the farmer slept in the shade under a particularly hot sun. As the words worked themselves from the farmers subconscious into his waking brain, he sat bolt upright and laughed harder than anyone had ever laughed in history. He recorded those words on a stone tablet, and eventually the words grew and spread amongst the people. And those words were:
Jul qvq gur puvpxra pebff gur ebnq?
And the rest, as they say, is history.
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Why does my milk go off whenever I leave it out of the fridge?