To speak of morality as Sage legislation is to a large extent contrary to morality  As Friedrich Engels said, Marriage without love is immoral The immorality here is precisely the Moralityadvocated in the feudal ethics  And this so-called class nature of morality, this kind becomes ideological morality
The moral concept in the feudal ethics became the spiritual shackle of the miserable marriage.
 But this is only false morality and does not prove that morality differs from class to class