I am a guest in your house, and you’ve just offered to make me a sandwich. I accept. Who doesn’t love a good sandwich?
You’re excited. You’ve got all sorts of good ingredients. You ask what I’d like on it — these days, you can’t be too careful with the allergies and the dietary restrictions and whatnot. “Go nuts”, I tell you. I have entrusted you to make this sandwich for me.
Time to get busy. You break out the bread. You squirt a little hot mustard on it. I’m going to stop you right there:
“What kind of sandwich is this?