Pay for what you get

The man at the counter of a bakery noticed a small boy standing by the front of the bread display. He has been standing there for a few minutes.

Curious, the man asked the boy, "What are you doing there?"
"Nothing, I'm just enjoying the smell of the newly-baked cinnamon bread," the boy replied.
"You can't do that. Get lost!" the man said in a loud voice.
"Buy why? I'm not bothering anybody," the boy protested.

"You're bothering me. Besides the aroma of the cinnamon bread is not free - you have to pay for it," the man said angrily.

"How much is a cinnamon bread?" the boy inquired.

"One dollar each."

The boy took out a five dollar bill from his pocket and held it up close to the man's face.

"How many do you want to buy?" the man asked

"I don't want to buy any. I just want to pay for the aroma of the cinnamon bread with the smell of my dollar bill," the boy replied.

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