In 1993, Cobain told "Spin" that on "Bleach" he "didn't give a flying fuck what the lyrics were about" and claimed that 80 percent of the lyrics were written the night before recording. He was often still working on the words on the drive to the recording studio. He explained: "It was like I'm pissed off. Don't know what about. Let's just scream negative lyrics, and as long as they're not sexist and don't get too embarrassing it'll be okay. I don't hold any of those lyrics dear to me." Nirvana biographer Michael Azerrad noted that, nevertheless, many of the songs on the album reflected Cobain and various incidents in his life. "Mr. Moustache" was inspired by Cobain's dislike of macho behavior, while "School" was a critique of the Seattle music scene, particularly Sub Pop.