It seems that the painter cannot escape his animal nature.

Sure, she didn't love him, but why fight animal nature?

And like him he seems to have some animal nature.

Men of animal nature rely, like animals, on their instincts.

But in this case, their animal nature would help them.

The other, and less bad, vices come from the devil working on us through our animal nature.

But this does not come through our animal nature at all It comes direct from Hell.

All the cruelty of animal nature in those two yellow eyes.

He decides at this inn to love the woman there and never reveal his animal nature.

"So milk that comes out of a real human breast, we're not very comfortable with, it brings us too close to our animal nature."