One day as Joe is sitting on the bench, a stranger drives up in his car, stops, and hands Joe a little bag. The man gets back in his car and drives off. Joe opens the bag and inside
is a sandwich. Joe doesn't know what to think, never mind what to do. But after awhile, he eats the sandwich.
Another day, another sandwich.
It happens again--and again.
Then comes the day when a mutual friend of ours is in Dunkin Donuts. He is friends with the man who's been giving Joe the sandwiches, but he doesn't know about the sandwiches. But he does see his friend buying a sandwich. To make light conversation he says to his friend, "I thought you were on a diet." The man responds, "Oh, it's not for me. It's for the homeless old man who sits on the library's bench."
No more sandwiches for Joe.