The ship's human brought a ukulele on board, now they've infected the gravity drive. -- Anon Guest
Many Galactics assume that Humans are naturally musical. The fact is that it rather depends on the Human, and the truth of the matter is that a Human involved in jobs that require waiting for something to happen will take up a hobby for something to do. Some take up fibre crafts. Some take up art forms. Others... take up instruments.
Many wish that the Human would put them down, too.
"She pulls her hair all down behind/ Then pulls down her... never mind/ And after that pulls down the blind/ When I'm cleanin' windows..." Human Jef was playing in the only place ze was permitted to play, in the Gravity Generator Chamber. Idly drifting from wall to wall as ze strummed. "In my profession I'll work hard/ But I'll never stop--"