HIM performed this song for the first time in Ilosaarirock, Finland on 12 September 1998, which featured an extra verse not included in the studio versions.
The song has met with controversy regarding its subject matter. "A couple of people blamed me for a suicide someone committed over here saying that 'Join Me' is an invitation to kill yourself," HIM frontman Ville Valo told the European magazine Metal Hammer in 2003. "What I was trying to do was sort of rip-off 'Don't Fear the Reaper' by Blue Öyster Cult, making a rock track of Romeo And Juliet." Lyrics such as "Would you die tonight for love?" have contributed to the misconception that the song is about suicide, which Valo denies, claiming the lyrics refer to giving things up for the sake of love. "It's not about suicide, that song. It's about giving it all away," Valo told the magazine Modern Fix.
Four versions of the song's video exist: three "lazer versions", two of which include different scenes from the Thirteenth Floor movie, and the fourth being an "ice version", with a vague Romeo and Juliet theme also attributed to the song.