I rerached a wonderful conclusion in my subject
The art of eating burgers. So I am contented.
( Enigmatic ™                 Voice No More                  ©, Thu 4 May 2006, 2:28, archived)

This theory,
of course, only applies to burgers with either not much salad filling, or a large bap to salad ratio.
(moomin-papa ; folkin class., Thu 4 May 2006, 2:38, archived)