he can! he can also play the guitar, it's one of the things that he learned while he was travelling. sometimes he needed something to do with his hands and it was difficult to try and write while it was dark by the campfire, you can't really fiddle with the pages of a book in the same way. he doesn't sing that often, usually he sings with lilly around the campfire or he'll sing to rigel when they're alone. not really something lots of people know about.