The most common explanation I've heard is paying for college. As for the names, I'd say it's about anonymity. If you were dancing, half naked for horny men stuffing dollar bills in your g-string, would you want to connect that with your actual name?
So, this very obvious connection is really the wine and the vicodin talking for us. Shame. Although, if the wine is going to keep you talking in ways to make my mind wander, I guess I shouldn't complain too much.