He didn't condemn adulterous woman. He did tell her to sin no more. B. Spouses may not be as forgiving. But it does happen, and often. A. Adultery is not limit of sexual sin.
Fornication is listed with murder.
It is not an option for Christians. Even committed, loving singles must abstain. Obedience to Jesus is the key. A. Sin begins with its inner manifestation. Lust is not innocent like many think.