Fornication = sexual sin out of marriage, single persons can do fornication
Adultery =Sexual sin whithine marriage, whaen one of the couple leaves the other member to marry an other, or if they broke up and then marry an other, or when one of the two having sex with an other ,then is called adultery.
So only if there is FORNICATION (premarital, or unlawful relationship they can and must brake it up and then if they repent they can avtually mary ,because they were never again married) Otherwise if they are not in fornication and are properly married: they can divorce but remain unmarried!
10 And unto the married I command, yet not I, but the Lord, Let not the wife depart from her husband: 11 But and if she depart, let her remain unmarried, or be reconciled to her husband: and let not the husband put away his wife.
The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.
For the woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband. 3 So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man.
Now look what is adultery and what Matthew spoke to the Jews!
-First keep in mind that Jwes asked if there was divorce primitive for any reason. Adultery was not considered a reason to divorce and remarry because adultery was punished by DEATH!
-Second see that the fornication is a separate and different act (sin) than adultry:
Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,
neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind
19 For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:
and so third and last look why marriage is the solution for fornication and not that fornication the exception for adultery:.
2 Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
So my Apostolic Pentecostal Oneness friend
and brother Michael , to avoid fornication ,which is every unlawful relationship ,out of marriage Paul suggest Marriage. But except be for the reason of fornication no man had the right to divorce his wife and if that happen, let them be UNMARRIED or? Or reconciled to her ex-wife.
Also keep in mind that the marriage is so holy because reflects the relationship between Jesus and his Wife (Church). Jesus has one and only Church! So the man "love your wife as th Lord loves the Church"