With that new concept, we needed a new word, and that was the word "pheromone," and it's basically transferred excitement, transferred between individuals, and since 1959, pheromones have been found right the way across the animal kingdom, in male animals, in female animals.
Con ese nuevo concepto, necesitábamos una nueva palabra, que fue la palabra "feromona", y básicamente, es "emoción transmitida", transmitida entre individuos, y desde 1959, se han encontrado feromonas en todo el reino animal, tanto en machos como en hembras.