Life and death.

Clean and unclean.

Light and dark.

Normal and abnormal.

Human and devil.

That's exactly why we who deal in arts crossing those boundaries are shunned.

However, it has also brought all manner of persecution and oppression. It's not a very nice thing to say.

Indeed... However, even outside that fence, it is in the nature of humans to build a new one.

And for that girl, that fence...