Fix up coherence mistakes in this:
Sex derives from the heavy metal genre's roots in blues music. Sex is another important topic -- a thread running from Led Zeppelin's suggestive lyrics to the more explicit references of glam metal and nu metal bands.
Deriving from the heavy metal genre's roots in blues music, sex is another important topic -- a thread running from Led Zeppelin's suggestive lyrics to the more explicit references of glam metal and nu metal bands.