Back in the early twenties, organ grinders used to go into bars with their pet monkeys and entertain the customers for tips. This particular grinder walks into a bar with his pet monkey and states that he can play any tune that they want to hear. With that, he perches the monkey on the end of the bar, and the monkey is hopping down the bar, when it plops his ass on top of a drunk's glass. The drunk yells, "Shay, old man, duh yah know your monkeys got his ass in my beer?"

The organ grinder replies, "No, but go ahead and hum a few bars, and I'll pick it up from there."