My mom told me the next day during the Depression sometimes that's all my dad, as a child, had in the house— Mayo and homemade Strawberry preserves. It was the one thing he could still stomach that he was forced to eat or go hungry. She said not to feel bad that I said “Yuck” because he was glad I could say that and could eat what I wanted. I was little and not born until my father was in his forties, so I had no idea, but I remember feeling guilty and sad for what I had said.
To this day I don't know if he ate those sandwiches because that's what he truly wanted or just thinking back to those old days.
My dad was depression era as well. I clearly remember his talking about taking Karo sandwiches to school for lunch.