Songfacts®:

• Spanish singer Rosalía and Puerto Rican artist Rauw Alejandro first went public with their romance in September 2021 with photos of the two celebrating Rosalía's 29th birthday together. Their shared love lives transitioned into a fruitful studio session, which resulted in their EP, RR. "Beso" is the record's lead single.
• "Beso" finds Rosalia and Alejandro pouring their hearts out about being in love and missing each other because of their busy careers. The old-school reggaeton beat and sentimental R&B vibes perfectly match their unique styles - they've both made a name for themselves with killer singles in this genre.
• "Beso" is Spanish for kiss, and it comes from the first line in the chorus where Rosalia claims another kiss from Rauw.
  
  Ya yo necesito otro beso
  Uno de esos que tú me da'
  
  Translates as:
  I need another kiss
  One of those that you give to me
  
  She later confesses how she needs Rauw.
  
  Y odio cuando te vas
  Yo me voy contigo a matar
  No me dejes sola, ¿pa' dónde vas, a dónde vas?
  
  Translates as
  And I hate when you leave
  I'll be with you 'til death
  Don't leave me alone, where are you going, where are you going?
• Rosalia and Rauw Alejandro wrote the song. They co-produced it with Noah Goldstein and Sir Dylan. Both producers worked on Rosalia's Motomami album, including the singles "La Fama," "Saoko" and "Despechá."
• The two producers played most of the instruments:
  
  Sir Dylan: synthesizer, bass guitar and piano.
  Goldstein: synthesizer and drums.
  
  Cuban percussionist Abraham Mansfaroll performed the percussion. He has contributed to the recording of many albums under various labels in Cuba, France and Brazil.
• The video sees Rosalía and Alejandro hanging out in different places, like the beach, city, studio, and bed. At the end of the visual, Rosalía flashes a diamond ring on her left hand and gets all emotional before smooching her new fiancé.
• The pair performed this song together for the first time on March 31, 2023, when Rosalía joined Alejandro during his headline show at the Hiram Bithorn Stadium in San Juan, Puerto Rico. Alejandro introduced Rosalía with a special announcement, saying, "This is a momentous night because I'm going to sing with the love of my life for the first time on this stage."
  
  They sang two songs from RR: "Beso" and "Vampiros." The crowd went wild when they saw Rosalía come out on stage. They sang along to every word.