Although WILDLY unpopular, as Bill suggested, I am forced to agree with him. (NOT that that is a bad thing...)
Biblically, it must have been a given. We see Paul reference it rhetorically in 1 Corinthians 6 like it should have been general knowledge...
1Co 6:16 What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.
For what mortal has ever heard the voice of the living God speaking out of fire, as we have, and survived? ~ Deuteronomy 5:26
If you're not prepared to risk your very life for your "enemy" you have no right to speak to him of love. ~ Daughter
Many say they are called... but I am pretty convinced that with many of them it was the wrong number. ~ Project Peter