We eat 300 million portions of fish and chips in Britain each year.

A customer at Green`s Gourmet Grocery marveled at the proprietor`s quick wit and intelligence."Tell me, Green, what makes you so smart?""I wouldn`t share my secret with just anyone," Green replies, lowering his voice so the other shoppers won`t hear. "But since you`re a good and faithful customer, I`ll let you in on it. Fish heads. You eat enough of them, you`ll be positively brilliant.""You sell them here?" the customer asks."Only $4 apiece," says Green.The customer buys three. A week later, he`s back in the store complaining that the fish heads were disgusting and he isn`t any smarter."You didn`t eat enough, " says Green. The customer goes home with 20 more fish heads. Two weeks later, he`s back and this time he`s really angry."Hey, Green," he says, "You`re selling me fish heads for $4 apiece when I can buy the whole fish for $2. You`re ripping me off!""You see?" says Green. "You`re smarter already."