What is something you would never eat?
I would have to say bugs.
I once swallowed a bug as a kid, I was riding my bike down the street and the bug went in my mouth and right down my throat. They also say you have probably swallowed a spider while sleeping. BUT I could never bring myself to pick up a bug, dead or alive, and eat it. Even though I know they are healthy, psychologically I find it too repugnant.