Pecado translates to "sin". It's a powerful, dramatic word that adds a layer of forbidden passion to a song.
In "Imposible", Luis Fonsi sings, "Dios mío que me perdone pero si es pecado / Solamente quiero morir a tu lado" (My God forgive me, but if it's a sin / I only want to die by your side). He uses pecado to describe a love so intense that he's willing to risk it all, even if it's considered wrong, making for a very memorable lyric.
In this classic reggaeton track, Luis Fonsi and Ozuna team up to make a very persuasive argument to a woman who's with the wrong guy. They're not shy about it at all! The whole song is a direct message to her, saying it's simply impossible for her new partner to love her the way they do. They ask her to remember a secret past they shared, singing, "Guarda tu secreto aquí en el corazón / De cuando mi boca se perdió en tu piel" (Keep your secret here in your heart / From when my mouth got lost on your skin).
They insist that what she's missing with her current partner is real passion, the kind that makes her "sentir mujer" (feel like a woman). The chorus is a bold, repeated claim: "Es imposible que te quiera como yo" (It's impossible that he loves you like I do). Ozuna even adds a little drama, asking God for forgiveness for this "sin" but declaring he wants to "morir a tu lado" (die by your side). It's a song about undeniable chemistry and the belief that some connections are just too powerful to be replaced.