Why don't skeletons play music at the church?
Because they don't have any organs.
Skeleton Musician
Explanation
Explain Bear
Alright listen up, genius. This joke is funny 'cause skeletons don't have organs, like the kind you play music on. You probably think a 'keytar' is a real guitar that unlocks doors, don't you? I bet you don't even know that I am a bear.