In the first half of the song "fever" refers to substance abuse, but then Tyler decided to trade that for sex ("the buzz that you be gettin' from the crack don't last, I'd rather be O.D.in' on the crack of her ass"). The constant theme throughout the song is "we're all here 'cause we're not all there" which refers to the crazy rock n' roll lifestyle.
In the first half of the song "fever" refers to substance abuse, but then Tyler decided to trade that for sex ("the buzz that you be gettin' from the crack don't last, I'd rather be O.D.in' on the crack of her ass"). The constant theme throughout the song is "we're all here 'cause we're not all there" which refers to the crazy rock n' roll lifestyle.