What was the original meaning of marriage? And what was Jesus’ teaching on the, subject of divorce?

In Matthew 19 we read that Jesus is heading from Galilee and traveling towards Jerusalem. As He went, He continued performing miracles and healing people.  But the dreaded Pharisees were relentless in their efforts to trap Him so they could have him arrested.  Verse 3 “The Pharisees also came unto him, tempting him, and saying unto him, Is it lawful for a man to put away (divorce) his wife for every cause?”  There were two major Jewish groups divided on the, subject of divorce and the Pharisees chose a topic that would serve to divide them even further.  Instead of picking sides, Jesus called their attention to the original meaning of marriage and pulled from an authority both groups acknowledged – the prophet, Moses.
Jesus responds in Verses 4 through 6 “And he answered and said unto them, Have ye not read, that He which made them at the beginning made them male and female, And said, For this cause shall a man leave father and mother, and shall be one flesh? Wherefore they are no more twain, but one flesh.  What therefore God hath joined together, let not man put asunder.”  Jesus refers back to Genesis 1:27 and Genesis 2:2-22.  We have no record of God performing any sort of marriage in the Garden.  There was no need because from the beginning Adam and Eve were one.  Jesus’s point to the Pharisees is that – when a couple come together, they come together in the model of Adam and Eve through marriage and – they become one in the same manner Adam and Eve were one.  When a man and woman come together in marriage, which is the sexual union of two bodies becoming one – they are like Adam and Eve – and nothing can break the union.