What does Matt think is the purpose of a gift?

It's fair to say that Matt doesn't really get the concept of what a gift entails. This is a direct consequence of his chaotic, unstable background. Matt is a wild child, a vagabond from the wrong side of the tracks—the Fen, to be precise: a dirt-poor neighborhood of the village. In such a bleak environment, the law of the jungle prevails. It's every man, woman, and child for themselves, forced to compete with each other for the most basic means of subsistence. It's not surprising, then, that the very notion of a gift, something you give to someone else without thought of recompense, is just too weird for Matt to comprehend.
Kira patiently tries to explain to Matt exactly what a gift means. She says it's something special you give to someone you care about. Matt can only laugh. Back in the Darwinian jungle that is the Fen, giving something special involves kicking someone up the behind.