Prisionero means 'prisoner'. While it's a known word, its use in a romantic context is striking and less common than typical love song vocabulary.
In this song, the lyric "Y como un prisionero me llevas a tu cama" (And like a prisoner you take me to your bed) uses the word metaphorically. It conveys a sense of being completely captivated and willingly surrendered to the lover's power, making it a memorable and intriguing choice.
Have you ever fallen for someone so hard that it actually freaks you out? That is the exact mood in "Enamorado" (In Love) by Los Aptos. The singer puts his heart completely on the line, admitting right away that life without this person feels impossible. He calls his crush "una forma de arte" [a work of art] and says her presence instantly heals him. Then comes the chorus, where he surrenders completely: "eres tú / La persona que me mata con una mirada" [it's you / The person who kills me with a single look]. He even jokes that she leaves him speechless and drags him off "como un prisionero" [like a prisoner] to her bed. It is sweet, dramatic, and intensely romantic.
What makes this track stand out is the honesty behind the infatuation. When he sings, "este amor es real, es lo que me asusta" [this love is real, that's what scares me], you see the real vulnerability underneath the compliments. Notice how he shortens para la eternidad to "pa' la eternidad" [for eternity]—that little drop from para to pa' is super common in casual Spanish speech. He promises he would cross the sea and find a way to give her the entire world just because her love is sweet enough to make all his pain vanish. It is a warm, giddy confession about being totally defenseless around the person you adore.