Or is it The 40 Year-Old Virgin...or The 40-Year-Old Virgin. Those dashes have been just about everywhere. Different uses in the official ad campaigns, even the various mentions in the LA Times. No one can agree, and this is coming from the camps who should know where to put a dash.
So my question today is...how DO you decide where to put a dash? Is there any official rule? Handbook? Is there an evolution of dashes in our culture vocabulary?
This issue has been bugging me lately because I'm editing Mom's autobiography, and she is a dash user. Multiple dash user on every page. But I can't necessarily say she's wrong. And staring at the words doesn't seem to help. So how do I decide?