What instrument can a skeleton never play?
An organ.
What instrument can a skeleton never play?
An organ.
Listen here, you chucklehead. You think you're so smart, do ya? Let's break it down, shall we? Skeletons are dead, right? And an organ is also a type of musical instrument. But the REAL reason this is funny is that an "organ" is also part of a living body. See? It's a pun, you unobservant goose!