Songfacts®:

• Over finger snaps and an echo-y, spacious backbeat, Cam exults in the pleasures of physical desire.
  
  I wanna call it for what it is
  And give you everything I've got to give
  Till there's nothing left
  
  The recipient of Cam's affections is her spouse, Nashville business broker Adam Weaver, whom she married in October 2016. "My husband and I will go drive and have a quickie in the back of the car. Why am I embarrassed to sing about that?" Cam said in a press release. "'Till There's Nothing Left' is a commitment. It's saying - I am gonna love you with everything I have, physically, spiritually, I'm so in."
• Cam wrote her profession of love with Nashville tunesmith Hillary Lindsey and pop songwriters Tyler Johnson and Jeff Bhasker. "It's like going back to prom night in the '80s to make out with your one true love," she told Apple Music. "At first the lyrics made me blush, and then I remembered that you wouldn't be embarrassed if a guy was singing this. Sex is ours, too. I remembered my Grandma Marvel giving me the sex talk when I was 12: 'Sex is like a milkshake: Once you have it, you're always going to want it.'"
• Dano Cerney directed the song's apocalyptic music video. Filmed at Portland, Tennessee's Hitching Post Western Saloon, the clip finds the bar's patrons making the most of their final moments.
  
  "It's the end of the world, and I know a little place in the eye of the storm," Cam explains of the visual. "Let's live our last moments dancing together in the neon glow."
• The song came about after an unsuccessful songwriting session between Cam, Tyler Johnson, and Hillary Lindsey in Los Angeles. After it produced nothing of note, Cam went back to her hotel.
  
  However, Johnson and Lindsey continued the session and they came up with a sound that Cam loved. She recalled to The Boot:
  "I get this voice note from them of Hillary singing, 'La-la-la-la-la-la,' [from the opening lines of the song], and she was playing this beat with this super scene-y kind of sound. I was like, 'Oh, this is amazing.'"
  
  The next day, Cam had a session booked with her with "Burning House" collaborator Jeff Bhasker and they finished off the song together.
• Cam performed the song on the September 2, 2020 episode of America's Got Talent accompanied by blindfolded acrobat performers Duo Transcend. Their trapeze routine featured pyrotechnics and dangerous drops, which were timed to Cam's vocal cues. The singer told Radio.Com, "lives were literally on the line." She added that she found it more nerve-wracking than performing the National Anthem at a major sporting event.