Cosquillas translates to "tickles" or "a ticklish sensation". It's a charming and somewhat whimsical word that isn't as common in song lyrics as more direct romantic terms.
In the song, the lyrics say, "Que conozca las cosquillas que me hacen reír" (Someone who knows the tickles that make me laugh). This line beautifully conveys an intimate and playful understanding between two people, highlighting a deep connection beyond just love, focusing on shared joy and lightheartedness.
"Tú" builds its whole case around one repeated line: "Que no existe nadie igual que tu" (That there is no one like you). Instead of piling on more compliments, ChocQuibTown keeps circling back to small, physical evidence — a laugh, a held hand, a racing pulse — to back up the claim. "Así son los latidos, cuando yo te tengo aquí" (These are the beats, when I have you here) ties the song's own quick rhythm to the feeling it's describing.
By the closing verses the singer has stopped arguing and is just repeating the point: someone came all this way just to say it again. The song never finds a second thing to say — it just keeps proving the first one.