if you think adultery is right then you are ignorant to the divine laws of God - not got the full knowledge but should know that as a human being (ignorant of the circumstance)
e/g a man who married a widow, had sex with her and then found out her husband was still alive - mistaken conscience but no bad intention
Fletcher
Mrs Bergmeir example - 'sacrificial adultery'
Durkheim - conscience as social conditioning
matter of group perception
used to be seen as a sin against God's laws
only morality involved is that of keeping or breaking a contract (marriage)
Freud
humanity has invented civilisation in order to control its instinctive drives (Thanatos and eros - sex and violence)
trying to repress sexual drives - if not sexually gratified in marriage then perhaps wish to seek sexual gratification outside of this marriage