"There are differences in how men and women feel and think," one flyer reads. "One of the reasons for this is the structural difference in the brains of men and women. It is known that men act based on theories, while women act based on emotions. The important thing is to understand each others' differences and divide roles well," it added, before stating that husbands and new fathers like to be thanked for carrying out basic tasks such as washing the dishes, changing diapers, and holding their children. "get frustrated for no reason."