Dagwood forgoes the Corned Beef?

Imagine my surprise when Dagwood, king of the mile-high sandwich (that bears his name), forgoes leftover Corned Beef for a pizza! Someone should check his temperature to make certain he’s not sick.

On second thought, perhaps this is part of a joke. The one that goes like this:

Question: Why did Dagwood not eat the leftover Corned Beef?

Answer: Who ever has “leftover” Corned Beef?