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> The head of the elephant represents both of the sexual organs. 
I didn't want to say it because it may seem obsessed, but yes. That is almost exactly my understanding too. I would go as far as saying the brain represents the balls/womb and the spine the penis/vagina seen from another view. But then you could turn it around and say the genitals represent the brain and the spine, and that it's actually all a manifestation of Kundalini (the spine). Turn it any way you want.