Since the OP also asked for funny variations on this bit, and I didn’t mention it in my post before, allow me to be the first to bring up:
“I am e-vil Ho-mer! I am e-vil Ho-mer!”
An earlier thread on this subject:
Funniest version- Jay’s Angel-Demon shoulder dispute from Jay & Silent Bob Strike Back.
It goes back at least as far as the movie Animal House in the late 70’s. It was used there and I remember it was already a cliche.
It goes much further back than that. I know I’ve seen it on Looney Toons cartoons from the 30s and 40s.