Steve - The "bestiality" thing, I don't know if you can even call it bestiality. If it walks and talks, how much of an animal is it? It seems to me that an inability to converse or reason in a human sense is what makes an animal an animal: a lower life form. So having sex with something -- someTHING, not someONE -- who irrefutably inhabits that life strata, that life context is what makes bestiality obscene.
Cerebus isn't an aardvark in the sense that an aardvark is an aardvark. An aardvark can't converse with you or understand what you're talking about.
There is no analogue for what Cerebus is in our world. He's a lot more human than the gorillas they teach sign language to and in our world, that's as high up as you can get in the animal kingdom.
5:56 and time for me to head back for my last prayer.