Because, since longer than anyone knows, we've been held together by a bond older than time itself. When the world was young, we walked through the halls of the sleeping gods, checking their tombs and wiping the fine copper dust from the ornate filigree of their eternal sepulchres.
In the coming darkness of the Age of Man, we were forced to take human form and flee the tombs, as they sank under the deepest oceans.
Once on earth, we formed a cult which kept the memory of the old gods alive so that their dreams would not be empty and their return would not be a surprise to the chosen of humankind.
And in the meantime we did some pretty crazy stuff in Texas and it's a good thing I was too drunk to remember a lot of it.
In the coming darkness of the Age of Man, we were forced to take human form and flee the tombs, as they sank under the deepest oceans.
Once on earth, we formed a cult which kept the memory of the old gods alive so that their dreams would not be empty and their return would not be a surprise to the chosen of humankind.
And in the meantime we did some pretty crazy stuff in Texas and it's a good thing I was too drunk to remember a lot of it.
(And as for the smell, why do you think the old gods retreated beneath the ocean?)