My rule of thumb is:
I will eat anything that does not eat me first.
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Acts 10:9-16
New International Version
Peter’s Vision
9 About noon the following day as they were on their journey and approaching the city, Peter went up on the roof to pray. 10 He became hungry and wanted something to eat, and while the meal was being prepared, he fell into a trance. 11 He saw heaven opened and something like a large sheet being let down to earth by its four corners. 12 It contained all kinds of four-footed animals, as well as reptiles and birds. 13 Then a voice told him, “Get up, Peter. Kill and eat.”
14 “Surely not, Lord!” Peter replied. “I have never eaten anything impure or unclean.”
15 The voice spoke to him a second time, “Do not call anything impure that God has made clean.”
16 This happened three times, and immediately the sheet was taken back to heaven.
Same here, mostly, except I simply could not eat bugs, spiders, scorpions — or cats or dogs. Go figure. I love snails, oysters on the half shell, fried squid ... all what many consider icky critters.
I still wonder about the first person to try oysters. He or she must have been hungry. Oh, and lobsters. When you think about it, they are as scary looking as they are delicious. Funny how we decide what we will and will not eat.
Lots to with culture and what you grew up with, I guess. In some cultures, bugs and worms are yummy. In others, birds nest soup, grilled porcupine, etc. (The first person to make birds nest soup must have been close to starvation!)