The American asks Russians why Americans do not use an idiom. Funny
Perhaps it not the American idioms. Perhaps Englishmen them talk? Or it 100 years during the lunchtime, and in the curriculum remained.
In my opinion, now it is more useful to study not idioms, and a common cultural context on which native speakers grow. Films, transmissions on a TV set, on the Internet. Perhaps even books.
For example, I read "Under a calotte". In one episode the local medical assistant speaks "Well, the doctor of the House at us is not present. It is necessary to rake all". Who does not know, this serial, that badly understands, about what speech.
Or now, for example, I read "the World on Klarksonu". Who these people whom he continually mentions? What it for transmissions? What it for songs? Completely its texts the reader of its column in "understands only Sandi ".