Ah - the joys of trying to teach someone about Twitter.

On tonight’s Late Show broadcast, Mindy Kaling (The Office) did her best to explain the social networking service to the talk show host. Unfortunately, David Letterman looked about as lost on this topic as Regis Philbin does on just about everything else.

Thank goodness Oprah’s already been schooled (or so we think).

(FYI - You can also follow VIP Breakdown on Twitter.)