Free Sample? (Larry Smut)

"Hey there, little boy where's your mum," said the man with a Costco uniform on.
I looked at him and stated, "I'm just here to get milk, I'm fifteen, old enough to be alone. Why do you ask, sir?"
"Just wondering, because I wanted to know if she might have wanted a free sample of some brownies," he said as he pulled a tray of mini brownies, "unless you want one.."
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Pure. Petite. Young. Innocent. Words to describe a fifteen year old Harry Styles who is critisized for being too small for his age, not hitting puberty yet. But what will happen when he takes a free sample from a kind stranger?