The guy looks around and sees no one except the bartender at the other end of the bar. The guy takes another sip of his beer and munches a few more nuts when again he hears the soft voice, "Man you are looking good, have you lost weight?"
The guy looks around, dazed and confused, and only sees the bartender down at the other end of the bar. He has another sip of his beer, a few more nuts, and the same thing happens again, the soft voice, "Wow, where do you buy your clothes? I simply love your jacket."
The guy calls the bartender down. "Do you hear voices?" the guy asks nervously.
"Voices?" the bartender asks, thinking he's got a weirdo sitting at the bar.
"Yeah, watch this," says the guy. He sips his beer and munches a
handful of nuts. Sure enough there's the soft voice. "Man are you smart or what?"
"Oh, that", says the bartender, "it's the nuts. They're complimentary."