Travesuras literally translates to 'mischief' or 'pranks', often used to describe the playful, harmless trouble that children get into.
In 'Fanática Sensual', this typically innocent word is given a clever, adult twist. By talking about 'travesuras en la cama' (mischief in bed), the song uses it to hint at playful and flirtatious adventures, making it a memorable example of how context can completely change a word's meaning.
This song is all about the anticipation and fantasy built up between two people who only know each other through phone calls and a photograph. The singer describes a woman who is a "fanática de lo sensual" (a fan of the sensual). She has his picture, and he spends the whole song imagining what she does with it when she's alone.
He details their late-night phone calls, where things get pretty heated. He can tell what she's thinking just from her breathing and gets her worked up by describing what he'd do to her. The whole relationship exists in this space of imagination and phone conversations, building up to the big question: "Que pasara cuando nos encontremos" (What will happen when we meet?). It's a classic reggaeton track that's more about the tease and the build-up than the actual event.