You piqued my interest - in what language is the literal translation of "dickhead" not insulting? And what does it imply in that language?
English language uses words such as pussy that supposedly mean a cat, but at the same time they interpret it as vagina; another word is the name Dick which also is being used to mean phallus!
...and the best one is spotted dick which is literally a British steamed pudding! https://en.wikipedia.org/wiki/Spotted_dick
Meanwhile, I get downvoted for commenting the obvious thing which is, English language is absurdly confusing for me as a foreigner and have no idea what to say without offending every English speaker!