In ancient Greece, a shepherd named Narcissus, who had rejected the love of the nymph Echo, fell in love with his reflection, which he saw every day in a stream. One day, he jumped into the water to find the person who had stolen his heart and amazed him, but his obsession led him to drown. "Oysters, professor," then, the word narcissism "It comes from here, right?" the students ask Meritxell Blay, a secondary school Latin and Greek teacher and author of the book Greek myths (Inuk Books, 2024). Since mythology as such does not exist as a subject, Blay explains it to his students in the Latin and Greek classes he teaches.