Back in the late ’70s/early ’80s grindhouse days, Italian filmmakers were cranking out some of the nastiest movies imaginable, such as Umberto Lenzi’s Cannibal Ferox (also known by the delightful title Make Them Die Slowly). Three poor sons-of-bitches go on a trip through a rainforest in Brazil, where they hope to prove to themselves that cannibalism is a thing of the past. Skeptics, be damned. Just to make sure that their favorite pastime isn’t taken for granted, the natives scoop out a guy’s brain and eat it and cut another man’s Johnson off and—that’s right—eat it. Good luck trying to enjoy fellatio after seeing this icky flick.