Biff is a boxer. He is a show dog -- he performs under the name Champion Hi-Tech's Arbitrage -- and so looking good is not mere vanity; it's business. A show dog's career is short, and judges are unforgiving. Each breed is judged by an explicit standard for appearance and temperament, and then there's the incalculable element of charisma in the ring. When a show dog is fat or lazy or sullen, he doesn't win; when he doesn't win, he doesn't enjoy ancillary benefits of being a winner, like appearances as the celebrity spokesmodel on packages of Pedigree Mealtime with Lamb and Rice, which Biff will be doing soon, or picking the best-looking bitches and charging them six hundred dollars or so for his sexual favors, which Biff does three or four times a month. Another ancillary benefit of being a winner is that almost every single weekend of the year, as he travels to shows around the country, he gets to hear people applaud for him and yell his name and tell him what a good boy he is, which is something he seems to enjoy at least as much as eating a bar of soap.