Songfacts®:

• This song of devotion about her man finds Allen warning other women: "Look at my ring. You can't have him." The gleeful, giddy track featured in series 3 of The HBO series Girls.
• Allen told Rolling Stone that placing the song in the show made perfect sense to her. "I think the show is brilliant, so it was more or less a no brainer for me," she said. "Greg Kurstin, who produced and co-wrote this track with me, played a few of the new tracks for a friend of his who works on the show. Apparently [music supervisor Manish Raval] loved the songs, and later came back to Greg asking if he could include one of the tracks in an episode."
• The song was inspired by Lily Allen's husband Sam Cooper's performance in bed. The singer laughed to The Sun: "He was embarrassed, but I think people know me for being candid about everything. So I can't just suddenly get married and not talk about those things any more, because I think my fans would be like, 'Er, why doesn't she talk about sex?'"
  
  "Sam was there when I was recording that track as I did it in the house," Allen continued. "He kept walking in saying, 'This is gross.' I said sorry but he knew what he was getting into when he got with me."