No Valid Defense/Excuse for Adultery ... EVER ....

[ok doser]

In some cases it is. God certainly gave us a great set of moral guidelines. But societies can and do generate societal norms, morals, that they choose to follow. This can be good or bad.

when they deviate from God's Word, it's bad

 

[CabinetMaker]

when they deviate from God's Word, it's bad

Yes it is.