Songfacts®:

• This mid-tempo track was written by American songwriter Priscilla Renea, who also co-penned the girls' "Worth It," and Canadian singer-songwriter Simon Wilcox, who also worked on Nick Jonas' "Jealous." Priscilla Renea is also a singer; her debut album, Jukebox, was released in 2009. She used the name Muni Long for her 2022 album Public Displays Of Affection.
• The song finds the girls asking their beloved to give them tattoos.
  
  Write on me
  Color outside the lines
  Love the way you tat me up
  Baby come take your time.
  
  Camila Cabello explained on the group's Instagram page. "To me the song is an extended metaphor where you're asking somebody to 'write' on you, envelop you with their words, make their mark on you like you're a blank canvas."
• The track has the tropical house-inspired vibe which was du jour in the mid 2010s. In fact, the song was co-produced by Kygo, the Norwegian DJ who helped popularise tropical house. He's joined by fellow Norwegians Stargate who have also worked with the likes of Beyoncé, Rihanna and Katy Perry.