“Perro” finds Romeo Santos putting his flaws under a magnifying glass and comparing himself to a restless dog that keeps chasing the next temptation. Using playful canine imagery, he admits that a single whiff of “una falda roja” can make him lose focus, yet he begs his partner to “put a collar on him,” train him, and teach him loyalty. The track becomes a confession of infidelity, but also a promise of change: Romeo owns his impulsive nature, blames inherited instincts, and still hopes that love, patience, and a firm hand can tame his wandering heart.
Behind the catchy bachata guitars and flirtatious ad-libs, the song explores a serious tug-of-war between desire and commitment. Romeo calls his lover “mi patrona,” asking her to set boundaries so he can bark away rivals and finally behave. It is equal parts apology, self-deprecating humor, and romantic plea—a reminder that even the biggest flirt can dream of becoming someone’s “perro tierno” if given guidance and a second chance.