[Music guy, in general? Guess that would explain his inclination to sit off by himself and play with an instrument he's never seen before. Then again, he's right... there isn't much reason to play around here.]

A hobby's a hobby. Even if it's pointless. It didn't stop my stupid brother from pulling his guitar out every two seconds when he was here.

[What Ichimatsu means is that it never hurts to indulge in something that gives Tim pleasure, but his encouragement isn't half as direct as his bite.]

... maybe I should've brought it.