There's a rather peculiar use of possessive pronouns. In my experience, it normally occurs in the context of referring to someone's familiarity with a particular subject (or lack therof), e.g.
You clearly know your art history.
What can I say, I don't know my Shakespeare.
He knows his Claret from his Beaujolais.
Even though the meaning of this construction is nearly always clear from the context, I would like to see a "formalized" explanation of this sort of usage— one that ideally would provide answers to the following questions:
What is the difference between saying You clearly know art history and You clearly know your art history? What sort of meaning does the your in the latter sentence serve to convey?
I think I've mostly seen this usage in British English. Is it a specifically British way of speaking or is it used in other varities of English, too?
Outside of referring to someone's degree of knowledge in a particular area, are there any other contexts that this usage can occur in? In other words, what other verbs besides know can be used with a personal pronoun in this way? (I think I've come across phrases like he loves his food, but I'm not too sure).