A customer at a local grocer marvelled at the owner’s quick wit and intelligence.
“Tell me, what makes you so smart?” the customer asked the owner.
“I wouldn’t share my secret with just anyone,” the owner replied, lowering his voice so the other shoppers wouldn’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 asked.
“Only $4 apiece,” said the owner.
The customer bought three. A week later, he went back to the store complaining that the fish heads were disgusting and he wasn’t any smarter.
“You didn’t eat enough, ” said the owner. The customer went home with 20 more fish heads. Two weeks later, he was back and this time, really angry.
“Hey,” he said, “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?” the owner replied. “You’re getting smarter already!”