I prefer another phrase from the course: "Socker är mat" (sugar is food).
Examples : En kaffe utan socker ( A coffe without sugar) Jag tycker om mjölk men jag tycker inte om kaffe ( I like milk but i don't like coffee)
I've got a mental image of this woman with no teeth shaking her fist at sugar.
You guys can't possibly give us this sentence and not teach us the word for diabetic :p
My knowledge of English language is imperfect, and I found out about the term "fiend" only now, sorry if this caused confusion. I was referring to the similarity with "friend", and how, conceptually, a "false friend" is an enemy. (Please feel free to delete my comment if it's not going to be useful to others.)