Several weeks back, I stumbled across a short article about a new music-listening device called Nervana. It zaps electrical signals into your ears, allegedly unleashing enough “fun brain compounds” to make you enjoy a Justin Bieber song. (That’s right: according to one of the device’s creators, test subjects found that the Bieb’s bubblegum pop correlated with a particularly pleasant stimulation pattern.) For just $299.99, you too can experience nerve-ana (pre-orders started last week). But is there any truth to all the hints that the device will get you, well, sorta stoned?