Why Are Holes So Creepy?

I just had my wisdom teeth (all four) removed on Saturday. It hasn't been too painful so far--and as long as I don't get an infection, it should only get better from here.

I noticed last night that the stitch that was holding the gums shut on the lower right side of my mouth has come out. I can now peer into the (kind of) empty socket. There are some creepy looking bones in there. In fact, I was so disturbed by peeking into that little hole just before bed, I had trouble sleeping.

What exactly is so terrifying about emptiness--and particularly about gaping holes in one's mouth, or any other part of the body? Being a Calvinist, I'm inclined to think it has to do with the essential bankruptcy of our souls, the gnawing emptiness inside that we're too afraid to face.

But I wonder what a Jungian analyst might say about the creepiness of holes ...