Smells Like Teen Spirit became Nirvana's most highly acclaimed and instantly recognizable song. Not many people can decipher it's exact lyrics but Cobain used a seductive hookline to hook the listener. Nevermind went on to sell ten million copies and make a reported $550 million (US) leaving Nirvana overnight millionaires. Cobain was shocked at the reception of his highly personal and passionate music repeatedly telling reporters that none of the band ever, ever expected anything like this. It quickly became obvious that the obsessively sickly and sensitive 24yr old was not going to cope well with the rock'n roll lifestyle. "If there was a rock star 101 course, I'd really have like to take it," Cobain once observed. Cobain fell into heroin in the early 90's, he said he used it as a shield against the rigorous demands of touring and to stop the pain of stomach ulcers or an irritated bowel. Through the touring and pressure Cobain continued to write his very personal acutely focused lyrics.