Smart

[Pip]

A customer at Gene's Gourmet Grocery marveled at the proprietor's quick wit and intelligence.  "Tell me, Gene, what makes you so smart?"

"Fish heads," says Gene. "You eat enough of them, you'll be positively brilliant."

"You sell them here?" the customer asks.

"Only $4 apiece," says Gene.

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 Gene.

The customer goes home with 20 more fish heads. Two weeks later, he's back and this time he's really angry.  "Hey, Gene," he says, "You're selling me fish heads for $4 apiece when I just found out I can buy the whole fish for $2. You're ripping me off!"

"You see?" says Gene. "You're smarter already."