A guy walks into a bar with an octopus and says, "This is a very talented octopus. He can play any instrument in the world. I'll give five hundred bucks to anybody who has an instrument that the octopus can't play."
A guy walks up with a guitar, the octopus takes it, and starts playing like Jimi Hendrix. Another guy walks up with a trumpet, and the octopus plays it better than Dizzy Gillespie.
A third guy walks up with bagpipes. He sits it down, the octopus fumbles with it for a minute, and then he sets it down with a confused look. The guy says, "Hah! You can't play it?"
The octopus looks at him and says, "Play it? As soon as I get its pajamas off, I'm gonna fuck it."