What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.
Fornicators are "members of an harlot" (1 Corinthians 6:15).
Joined - by carnal, sexual intercourse; literally, cemented to х kolloomenos (G2853)] (Numbers 25:3).
One body - with her.
Saith he - GOD speaking by Adam (Genesis 2:24; Matthew 19:5).
Two ... shall be one flesh. Eve was taken out of Adam, "flesh of his flesh," to be rejoined to him as "one flesh."