I have a lot of fun at dinner parties. As a result, I throw a lot of dinner parties and my friends see me there and think that I’m fun. But if I couldn’t have lots of dinner parties, if my friends instead tended to see me in lots of different situations over which I had little or no control—like, say, faced with four hostile youths in a filthy, broken-down subway—they probably wouldn’t think of me as fun anymore.
