A man walks into a bar with an octopus...

...he sets the octopus on the bar and says to the bartender, "I'll bet you $50 this octopus can play any instrument you have."
The bartender agrees and directs him to a piano in the corner. After the octopus sits down and plays a few bars the man asks the bartended to pay up.
"Hold on" says the bartender and hands over a guitar.
The octopus takes the guitar, gives it a quick tune and plays a little song. The man again asks the bartender to pay up.
"Just a minute, I think I've got something else here."
The bartender disappears into the back room for a couple of minutes, comes back out and puts a set of bagpipes down on the bar.
The octopus moves around it, looking confused, picking up the pipes one at a time and putting them back down until the man says, "what's wrong? Can't you play it?"
The octopus says, "play it? If I can figure out how to get its pajamas off, I'm gonna fuck it!"

Edit:typo