A guy walks into a bar after a long day at work and orders a drink. After his first sip, he hears a high-pitched voice.
"Hey mister! Nice pants!" it says.
He looks around, doesn’t see anything, and quickly shrugs it off. After a little bit, he takes another sip and hears the voice again.
“Hey mister! Sweet shoes!”
Again, he looks around, sees nothing but a barman who is busy attending to other customers. Shaking his head, he sips once more.
“Hey mister! Cool shirt!”
He puts down his drink, frustrated at this phantom voice, and signals to the bartender, who comes over.
“Hey barman,” he begins, “what is that high-pitched voice I keep hearing?”
“Oh, those are the peanuts,” he replies. “They’re complimentary.”