Necrophilia is rape
Funny how so many mainstream and otherwise "respectable" critics like Ebert loved the movie, yet ignore the legal fact that necrophilia is considered by many scholars to be legally (at least in civilized jurisdictions - there are still many jurisdictions in the US where one can legally get away with raping corpses if they have a good lawyer due to loopholes) a sex crime and considered to be a form of rape, but against a corpse rather than a living person. Bunch of repentless degenerates.
Food for thought: http://digitalcommons.law.scu.edu/cgi/viewcontent.cgi?article=1099&context=facpubs