Trigo literally means "wheat". While it might seem strange to call a person this, it's a beautiful and poetic metaphor in this song.
In the lyrics, the singer lists the things his partner is to him: "mi razón, mi paz, mi sol, mi trigo" (my reason, my peace, my sun, my wheat). By comparing her to wheat, a staple food source, he expresses that she is his sustenance and is essential for his survival. It’s a truly unique term of endearment that shows the depth of his love.
"Simplemente Gracias" by Mexican group Calibre 50 is an unashamedly sweet love letter that skips the usual heartbreak drama of Regional Mexican music. The singer is completely head over heels, admitting that time flies when they are together ("No siento las horas cuando estoy contigo" [I don't feel the hours when I'm with you]). He loves everything about his partner, right down to the tiny details with "Amo tus lunares y tus cicatrices" (I love your beauty marks and your scars). It feels like finding someone after a lifetime of searching, leaving him to wonder whether it was God or destiny that finally brought them together.
The chorus hits you with some wonderfully over-the-top romance: "Y si no existieras, yo te inventaría" (And if you didn't exist, I would invent you), followed by a promise that if she ever looks up and sees an empty night sky, it is his fault because she deserved every single star ("No me culpes, pues te las merecías" [Don't blame me, because you deserved them]). He calls her his peace, his sun, and his wheat ("mi paz, mi sol, mi trigo"), using wheat as a symbol of life and daily nourishment. Beyond the sweet poetry, he offers real safety, saying his arms are open and ready to heal her fears ("Aquí están mis brazos... Que para tus miedos yo tengo la cura"). At its core, the whole song is just a heartfelt way of saying: thank you for being in my life.