The song tells the story of a twisted man killing his girlfriend because he doesn’t believe she loves him back, and Sixx revealed in his memoir, The Heroin Diaries, that the song was inspired by a relationship in his own life.

Sixx said the song was written when he believed his then-girlfriend was cheating on him with actor Jack Wagner, who, as Billboard reports, had previously scored a radio hit in 1985 with his ballad “All I Need,” which the Mötley Crüe song references in both its title and lyrics. Sixx later opened up more about “You’re All I Need” with Rolling Stone, admitting that “the premise of the song was based on killing your girlfriend.”

Sixx also revealed in the same interview how he showed the song to his girlfriend at the time, saying, “I took the cassette over to her apartment and I didn’t say anything. I just had a little cassette player and I just played it for her, and she started crying, and I walked out the door. I was like, ‘Well now, that’s that.'”

While that may have, indeed, been that for Sixx’s relationship, it certainly wasn’t for “You’re All I Need,” which has taken on an entire legacy and reputation of its own in the decades since its original release.