I have always had trouble when people talk to me and say "we" - because I often don't know whether that includes me or not.
"Hey, we're going to the movies." Just by that, how do I know if they want to include me or not without having to ask if I can come, too?
Some languages have this 1st Person Plural distinction of specifying whether the person being spoken to is included or not. Has this concept ever been been a topic in the history of the English language?