Cardo literally means "thistle," a prickly, flowering plant. It's a very unusual word to find in a song, which makes it so interesting!
In the lyric "Eres mi cardo y mi dieta" (You are my thistle and my diet), the singer uses it in a powerful metaphor. By calling his lover a "thistle," he suggests she can be difficult or painful, while "my diet" implies she's also an essential part of his life. This beautiful contrast perfectly describes a complex and addictive relationship.
La Santa Grifa gets straight to the point in "Tocame." This isn't a love song; it's a song about pure physical desire between two people who are using each other to forget their pain. He's very clear when he says, "no te hablo de amor / Porque también tienes roto tu corazón" (I'm not talking to you about love / Because you also have a broken heart). Instead of romance, he offers a different kind of connection, one based on passion and mutual understanding.
The whole track is a direct invitation. The chorus is a constant plea: "Tócame, bésame, abrázame, úsame, siénteme, nena acaríciame" (Touch me, kiss me, hug me, use me, feel me, baby caress me). He admits that even though he's not in love, he can't stop thinking about her, saying she brings color to his gray world. It's a raw and honest look at a relationship that's all about the physical, finding comfort in another person without the complications of love.