If a man feels desire and makes an image of someone in his mind or calls their name, there is no problem if it is a wife or servant girl of his, if he is absent from her, for the act is permissible and it is not forbidden for him to fantasize or imagine. But if it is a boy or woman other than a wife or marriageable relative, this is disapproved, since he is seducing himself by what is forbidden and arousing himself by it.