A man walks into a saloon, draws his gun and shoots the piano player dead.
“I’ve been itching to do that for a long time,” he says, “that bloody noise has been driving me mad.”
The barman beckons the man to one side.
“Mind if I give you a bit of advice, Mister? If I were you I would file off any sharp edges on your gun and grease the barrel.”
“Is that supposed to make me a better shot?” asks the cowboy.
“No, but you’ll find it’ll make things easier for you. That piano player you just killed has two big, mean brothers and when news gets to them about what you did, they’ll shove that gun right up your ass.”
