Get ready for a track that is direct, explicit, and all about physical passion. The lyrics themselves declare, "Esta canción grita sexo" ("This song screams sex"), leaving no doubt about its theme. La Joaqui and Peipper trade verses describing an intense and raw sexual encounter, using powerful imagery of dominance and desire. The song is filled with bold invitations and commands, like the repeated line, "A mí no me pongas triste / A mí ponéme en cuatro" ("Don't make me sad / Put me on all fours"), which contrasts emotional vulnerability with a demand for a specific physical act.
The song's narrative centers on seduction and pleasure, with lines like "Voy a convertir a tu novio en ex" ("I'm going to turn your boyfriend into an ex") adding a layer of forbidden excitement. It also features very specific Argentine slang, such as the phrase "Siempre Turrón, nunca Mantecol," which plays on the names of two popular sweets to mean "always hard, never soft." Overall, "Leche" is an unapologetic and fiery anthem celebrating a powerful and uninhibited sexual connection.