I hate stupid questions...

Every day, my coworker asks me if I'm going to go to lunch.  One day, I'm going to announce that I'm fasting for the unforeseeable future and devoting all my time and energy to work... which barely keeps me busy at all. Seriously, I spend more time killing hours browsing the web than doing any actual work, and it drives me nuts. Yet I can't listen to music/audio books on my ipod, because it looks unprofessional, and the powers that be would ask why I'm not working.  I can't tell them that I don't have anything to do.  I have to sit there and pretend to be busy.  Gah!!