10. Homer Gets Raped By A Panda - "Homer Vs. Dignity" (12.5)
Nobody seems really sure as to why this happened, nor why anybody on The Simpsons writing staff thought it was funny in the first place. Basically, then, the sum of this joke consists of Homer dressing up like a panda, only for another panda to sexual assault him in a way that implies rape. An incredibly bizarre, ill-judged "gag" that was met with a ton of complaints. To be fair, it set out to be shocking, and it succeeded.