You’ve prepared yourself lunch — a modest sandwich.  A friend arrives just as you are preparing to sit down to eat.  You ask, “Have you had lunch?”

“No,” they answer, “but please don’t go to any trouble.  I’m fine.”

To make another sandwich, one for them, is a solution.  Better, though, because then they do not feel as if they have caused you more effort, is to simply cut the sandwich gracefully in half, add a piece of fruit to each plate, and sit down and enjoy each other’s company.