Once a year, menstruation. He remembered that friend of his who, in the seventies and in El Cafetín Musiquero, got rid of a naive girl by telling her that what bad luck, having touched her.
Of all the fun that the day provides, she highlighted that study that says that the number of women who are dedicated to mathematics is much lower than in the mid-nineties. The fault, of course, lies with the men, who have made mathematics a teaching and sexist aggression.