You've seen human skulls, right? Well, look in a mirror, and imagine your own skull. Can you see it underneath your skin? Once you do, notice how your eyes suddenly look like gelatinous blobs, how your skin looks like a leathery cover for the macabre structure beneath it, how your hair seems like so much extraneous fluff stuck on top.
Now take any type of food, and watch yourself eat it. See your fleshy lips surround the food as you place it in your mouth. Watch your cheeks and gums as you chew it. Consider that you need to do this several times a day just to remain alive.
I'm having a very existential moment right now.