Added: I have a very sensitive stomach and can throw up if I eat the wrong foods (inherited this from my dad). Other foods make me feel bad without nauseating me. Fats on meat and mayo are examples of foods I can't eat. When I was younger, I was more susceptible to being pressured to eat foods I didn't like the look of and got sick a lot more often than I do now.

If you don't have this problem, it's probably hard to understand that it's preferable to go without than to eat something you don't like that might also make you feel unwell. Why bother?

This is another reason for why I tend to give the kids what they like.