I cannot envision, for example, my eating a fertilized egg in the Philippines, fried tarantulas in Cambodia or maggot cheese in Sardinia. Squeamish? Okay, call me so, but I assume that what I choose to eat might be as equally repulsive to someone from another culture. Taste is acquired. And acquired taste is habitual.
“Food for thought” is the analog of food for cows.
It’s very difficult for any of us to have the insight to say, “Hey, wait a minute! This is grass. We’ve been eating grass!”