This features and was co-written by Lovefoxxx from the Brazilian electro-trash band CSS. Frontman Bobby Gillespie told Uncut magazine February 2008 about this collaboration with the singer: "Our voices sound great together. There's three verses I've written, and we got her to write a verse of her own. It's a song about a destructive relationship. That one's not an up, happy song."
Gillespie told The Sun July 11, 2008: "It's just a very honest song about relationships, about a f--ked up love affair. No matter how bad it is, you just go back for more. I think all love affairs are f--ked up."
Gillespie explained to The Sun why they decided to team up with Lovefoxxx: "We love the first CSS album and Lovefoxxx is a really great girl. We asked her to sing on a track before we'd even written it. Her voice is so soulful and sexy."
Geffen Records made history on June 27, 1994 when Aerosmith's "Head First" became the first major label song made available for exclusive digital download. Download speeds at the time were so slow it took around 75 minutes to download the track.