Pig Kisser...

Hold it right there Dr. Freud, humanity's attraction to animals is not sexual. For those for whom it is, well, good luck...

You could say our attraction is based on fear, or more specifically, self-doubt. You could say we are made uneasy by the frustratingly ambiguous gaze of animals upon us as we flex our entitlement to the planet, and use it as a forum for mastering and multiplying something we call Civilization.

You could also say that a child, not yet indoctrinated to the ways of humanity, senses no ambiguity in the animal's gaze. Only curiosity, and perhaps, something we call Love.

You could also say that the taste for bacon is acquired at an early age.