The Melodious Dipso

A melodious dipsomaniac walks into a bar and says to the bartender, "If I can make my ass sing, do I get a free drink?"

The bartender says, "Sure, why not."

So the drunk jumps up on top of the bar, drops his pants and takes a gargantuan shit.

All the patrons run screaming out into the streets.

The bartender is furious.

"You sonofabitch, why the hell did you do that?!" he screams.

The drunk replies, "Hey. Even Sinatra had to clear his throat."