Imagine if someone handed you a food you were unfamiliar with and said, "Here! It's good. Eat it." Would you? Or would you pause and ask "What does it taste like?"
We use our previous experiences with food to provide context and expectation for our new experiences. Doing this helps us feel more comfortable trying something new. When we know it will taste "crispy and salty with a hint of lemon" or "sweet and creamy" it's easier for us to prepare for that first bite.
Now imagine that you are your 5 year old who is still exploring the world of food. And language. Someone hands you baked eggplant which, let's be honest, looks a little dodgy, and says "Here's dinner. Eat up. It's good for you." What would your response be?