Secrets about The Simpsons

Who would have thought Homer hated Duff?
'The Simpsons' is one of the biggest and longest running shows in TV history, and cemented itself in popular culture ever since its 1989 debut, and with that history comes a long list of shocking secrets and behind-the-scenes stories.
From hidden cameos to spooky coincidences, here are some of the biggest secrets of 'The Simpsons'...