He had been writing down the lyrics while he thought of them and read through them quickly . He could n't help the bursts of laughter that bubbled up . It was the most lovesick thing he 'd ever seen , but he liked it .

Question: What may be the reason for him laughing at himself ?
Answer: He is awful at writing .He was proud of what he 'd written .None of the above choices .He does n't know what the song means .