Read the following article and answer the question by choosing from the options.

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 .

What may be the reason for him laughing at himself ?
Choose from:
(a). He is awful at writing ..
(b). He was proud of what he 'd written ..
(c). None of the above choices ..
(d). He does n't know what the song means .....A:
(b).