Am I Supposed To Eat In These?

So many questions...My dentist's office told me to wear them 23/24 hours a day to make this journey 6 months. They told me to eat in them. I hate eating in them. It's so gross. I also hate the way the buttons feel when I take them out, so I don't like eating in them when they're out. They're amazing for discouraging eating. That's for sure. Are the buttons supposed to be scratchy and terrible feeling? How do I know my dentist has the right plan for my teeth?