What is nymphetamine?

"Nymphetamine" is a song by British extreme metal band Cradle of Filth, from their 2004 album of the same name. The song features guest vocals by Liv Kristine, the lead singer of the band Leaves' Eyes. The lyrics of the song explore themes of darkness, passion, and addiction. "Nymphetamine" is often considered one of Cradle of Filth's most popular and well-known songs. The band has performed the song live numerous times and it has been praised for its mix of intense metal instrumentation and haunting vocals.