Two polite people having dinner

There are two polite people having dinner together in a restaurant.

On the table there is a dish with one big piece of fish and one small piece of fish.

They politely say to each other, “You may choose first.”

“No, you may choose first.”

And this goes on for a while.

Then the first person says, “OK, I’ll take first.”

And he takes the BIG piece of fish.

The second person, “Why did you take the big piece? That’s not polite!”

The first person says, “Which piece would *you* have taken?”

The second person replies, “Why, I would have taken the SMALL piece, of course.”

The first person says, “Well, that’s what you have now!”