Seriously though!

Textural variation makes food interesting for the mouth. That's why fresh, crisp lettuce is so good in a sandwich - not because lettuce tastes of anything, but because it gives that satisfying crunch.

Texture is why we put croutons in soup, and why we sprinkle crispy onions on a hot-dog.

I've never eaten a toast sandwich, but if all I had left in the house was bread and butter, it might be quite fun to try.