Presiento comes from the verb presentir, meaning 'to have a premonition' or 'to sense something beforehand'. It's a more evocative word than simply 'I think' or 'I feel'.
In the song, the lyric "Desde que te vi presiento que algo bueno va a pasar aquí" (Ever since I saw you, I have a premonition that something good is going to happen here) uses presiento to convey a strong, intuitive feeling about the future. It adds a touch of destiny and excitement to the budding romance, making it a memorable and intriguing word choice.
"Lento" catches the moment attraction turns into an instruction. Gemeliers open on a first glance: "Te vi, no supe que decir" [I saw you, I didn't know what to say], before the hook lays out the whole point of the song: don't rush it. "Lento lento lento" [Slow, slow, slow], the chorus repeats, "A mí me gustan tus movimientos (ay)" [I like your movements (oh)].
The second half turns the flirting into an actual night out. The narrator remembers meeting her in Madrid, "La conocí cuando fui a Madrid" [I met her when I went to Madrid], then pulls her onto the floor with "Vengase pa' ca que yo no bailo sola" [Come over here, I don't dance alone] and "Báileme paga'o que yo lo quiero sentir" [Dance close to me, I want to feel it]. By the closing name-check, Joey Montana, Gemeliers, Sharlene, the shy opening line is long gone.