Bert and Ernie occupy such a mighty place in the popular imagination that it’s hard for us to remember that they began as a reference to something else. But in the Jim Henson universe, sly, humourous, or worthy commentaries on public figures and social issues were always part of the process. The recent public debate about them seems to have handily sidestepped the fact that the characters are, among other things, an obvious allusion to The Odd Couple, originally a 1965 Broadway play by the late Neil Simon.