Framilode I often refuse meals when flying long-haul. They try to adjust to time changes with the meals they serve, but it doesn't always agree with what my 'internal clock' is saying. Having hardly moved a muscle for endless hours, too, results in a lack of appetite. I have been offered some very strange breakfasts on planes, in my time.
My daughter was travelling in South America when, after a very early start on a trek, they stopped for a meal. The only food on offer was guinea pig. She was starving, so she ate it. It tasted rather like chicken, she said.