Alardear means 'to boast' or 'to show off'. It's a powerful verb that perfectly sets the stage for this dramatic song.
"Yo También" is a musical showdown between two men arguing over who was the better lover. The song kicks off with the challenging line, "¿Quién eres tú? Para alardear y presumir..." (Who are you? To boast and show off...), immediately pulling you into their passionate and competitive story.
Two men sit down to argue over who loved the same woman better, and neither one is backing off. Romeo Santos and Marc Anthony turn this bachata track into a heated, line-by-line duel of male pride. Instead of throwing punches, they throw metaphors. One asks, ¿Quién eres tú para alardear y presumir? ("Who are you to boast and brag?"), while boasting that he made her reach the stars. The other fires right back with an outrageous comparison: Como Colón yo navegue toda su piel ("Like Columbus I navigated all of her skin"). It is dramatic, a little ridiculous, and completely entertaining.
The chorus hits the core argument with the repeated title phrase: Yo también ("Me too"). Both singers insist they did not just view her as a casual fling. They claim they gave her genuine devotion, trading lines like le ofrecí un amor a lo Romeo y Julieta ("I offered her love, Romeo and Juliet style") and insisting it was no sólo pasión entre las sábanas mojadas ("not just passion between wet sheets"). By the end, they list every extreme thing they offered—promising to fetch the full moon, being her friend and lover, and giving up their souls—leaving the listener with a fierce showdown where neither man is willing to lose.