What food would you never put in your mouth for any reason, and why?
The obvious answer for me is something akin to a hunk of steak or tuna or bacon. However, seeing as I used to eat meat, and would not be opposed to the consumption of vat-grown meat (Animal-free! Science is awesome.) I feel that answer is cheating.
reason is difficult. Insects come to mind, but if I were starving and had no other option, I couldn't rule them out. Plus, I've already consumed insects in my lifetime, just not whole or consciously. Plenty of bugs used to land in my pool when I was a kid and if you weren't paying attention they would go down your throat when you surfaced for air. A fly flew into my mouth through an open car window once and almost every time I eat food with red coloring, I am eating crushed up beetles. So, not insects then.
What about human flesh? If I came across a human corpse whilst starving, could I eat human flesh? Could I become a cannibal for survival? I'm very squeamish and get dizzy at the sight of even a papercut on someone's finger, but in the face of life or death choices, morale and the will to survive can do some strange tricks on the mind.
I don't think I can answer this question with 100% certainty, other than resorting to obvious answers such as "an extra-terrestrial being from the outskirts of Alpha Centauri. Eh, fuckit, let's go with that answer.