Well this happened today, and it was pretty funny! After our first flight was cancelled, our family of 4 was rebooked on a flight in which one of us would receive a first class seat. Wife and I discussed who would get it then finally decided youngest daughter (age 13) was due for some royal treatment so we let her have it. It was a 3.5 hour flight with breakfast from Seattle to Memphis (NW). After we got off, the three of us were all asking - "What did you get for breakfast?"
We were speechless when she told us "I wasn't hungry so I didn't order anything." Mom and big brother (age 17) were nearly irate. Then poor daughter felt humiliated so started sulking.
I tried to smooth it over..."That's one of the nice things about first class..you can do whatever you want...if you don't want to eat, you don't have to!!"
But Mom had to get in one more - "Next time if you're not hungry come get one of us and we'll eat it!!"