I dug my perfect row of teeth into my pencil, releasing a hefty dose of pent-up frustration in the process, while reviewing the list of production jobs for the umpteenth time. Ouch! The chills! My tooth underwent its second (well-deserved) rub-in of the hour with the metal crown of the pencil. Poor, poor pencil, it has endured more chewing, biting and nibbling in a day than any dog-bone does in a month.