The Chainsmokers duo of Andrew Taggart and Andrew Pall penned this tune with regular collaborator Emily Warren and another of their friends Britt Burton. The latter pair also co-wrote Jessie J's hit song "Masterpiece."
The Chainsmokers recalled the story of the song in a Facebook post: "Drew found himself saying in the session 'I hate to say it but you're just my type' as we listened to the piano riff on loop. This led us to writing a song around the idea that we can't help who we fall for. Sometimes we cannot choose who we are attracted to, even if they are bad for us."
Emily Warren also supplies the vocals. Andrew Taggart said: "Emily does a beautiful job singing from this perspective about an attraction that is poisonous but addicting."