Shun immorality. Every other sin which a man commits is outside the body; but the immoral man sins against his own body.  Do you not know that your body is a temple of the Holy Spirit within you, which you have from God? You are not your own; 20 you were bought with a price. So glorify God in your body.

1 Corinthians 7

 Now concerning the matters about which you wrote. It is well for a man not to touch a woman.  But because of the temptation to immorality, each man should have his own wife and each woman her own husband.  The husband should give to his wife her conjugal rights, and likewise the wife to her husband.  For the wife does not rule over her own body, but the husband does; likewise the husband does not rule over his own body, but the wife does.  Do not refuse one another except perhaps by agreement for a season, that you may devote yourselves to prayer; but then come together again, lest Satan tempt you through lack of self-control.  I say this by way of concession, not of command.  I wish that all were as I myself am. But each has his own special gift from God, one of one kind and one of another.  To the unmarried and the widows I say that it is well for them to remain single as I do.  But if they cannot exercise self-control, they should marry. For it is better to marry than to be aflame with passion. To the married I give charge, not I but the Lord, that the wife should not separate from her husband  (but if she does, let her remain single or else be reconciled to her husband) --and that the husband should not divorce his wife.

 

And Pharisees came up to him and tested him by asking, "Is it lawful to divorce one's wife for any cause?"  He answered, "Have you not read that he who made them from the beginning made them male and female,  and said, 'For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh'?  So they are no longer two but one flesh. What therefore God has joined together, let not man put asunder."  They said to him, "Why then did Moses command one to give a certificate of divorce, and to put her away?"  He said to them, "For your hardness of heart Moses allowed you to divorce your wives, but from the beginning it was not so.  And I say to you: whoever divorces his wife, except for unchastity, and marries another, commits adultery."  The disciples said to him, "If such is the case of a man with his wife, it is not expedient to marry."  But he said to them, "Not all men can receive this saying, but only those to whom it is given.  For there are eunuchs who have been so from birth, and there are eunuchs who have been made eunuchs by men, and there are eunuchs who have made themselves eunuchs for the sake of the kingdom of heaven. He who is able to receive this, let him receive it."