Acaloras comes from the verb acalorarse, which means to get hot, flushed, or even to get heated in an argument. It's a vivid word that captures a physical reaction to strong emotion.
In this song, Andrés Cepeda sings, "Dime si tú cómo yo te acaloras, se te va el aire, pasan las horas." He's asking if his love interest feels the same intense physical sensations he does – getting hot and breathless – when they are together, highlighting the passionate and overwhelming nature of their connection.
“Le Viene Bien” starts small: a woman who gets up beautiful every day and dances to her own song even when it's raining outside. Andrés Cepeda and Greeicy spend the whole song reading her, and what they notice is a rose tattooed on her back that gives away what she actually wants. “Me cuenta que de ganas se muere” (it tells me she's dying with wanting), and the next line finishes the thought plainly: “Por estar otra vez en la playa” (to be at the beach again). The chorus doesn't dress that up, it just states the fix: “Coquito, arena y playa le viene bien” (coconut, sand and beach suit her well), repeated until it sounds less like flattery and more like a diagnosis.
The second half moves from watching her to being with her. “Tienes que saber que andar contigo” (you should know that being with you) followed by “Es como estar eternamente acompañada en libertad” (is like being endlessly accompanied, in freedom) is the song's real argument: company that doesn't cost her the freedom she clearly needs. By the bridge he's stopped describing her and started repeating himself, “Y tú, y tú, y tú, y tú, y tú” (and you, and you, and you, and you, and you), like a man who's lost count of how many times she's crossed his mind, before the song settles back on the coast: “Sabes llegar a ese lugar allí en la orillita del mar” (you know how to get to that place, right there at the edge of the sea), exactly where it started.