A number of religions in Ankh-Morpork still practiced human sacrifice, except that they didn't really need to practice any more because they had got so good at it.

“...it's true that some if the most terrible things in the works are done by peo…”

“Oh dear...I've never really liked the Yanks.They're really very nice people, yo…”

“I never said nothing...""I know you never! I could hear you not saying anything…”

“Zoology, eh? That's a big word, isn't it.""No, actually it isn't," said Tiffany…”