A man came into a pet shop carrying a parrot in a bird cage.
"I want to return this bird," said he.
The owner sighed at the prospect of facing yet another this-bird-won't-talk complaint.
"Sir," he said, "we guarantee that all our parrots can talk. However, we can't guarantee when they will talk. It's all spelled out on your sales receipt."
"No, no, you don't understand," the customer said. "The bird talks. I just don't like his attitude."
Puzzled, the store owner said, "You're right. I don't understand. Explain it to me."
"I bought the bird a week ago," the customer said. "Every morning, I'd stand in front of his cage and ask 'Can you talk?' I did the same thing every evening. For six days, I got no response. Then, this morning, I shouted at the bird, 'CAN YOU TALK, SILLY BIRD? CAN YOU TALK?'"
The customer glared at the parrot. The owner asked, "So, what happened?"
"That bird looked at me," the customer said, "and said,
'I can talk, all right. Can you fly?'"