A guy goes into the bar with a carrot in his ear. He orders a drink. The bar tender wants to mention the carrot but decides against it.

On the next day, the same guy with a carrot in his ear goes to the same bar and orders a drink. Again, the bar tender wants to say something about the carrot but doesn't.

The 3rd day the same guy and the same carrot go to the bar and order a drink. As the bar tender serves the man he can't stand it anymore. He says to the patron, "Hey, you know you've got a carrot in your ear?"

The patron says to the bartender, "I can't hear you! I've got a carrot in my ear."