1 Corinthians 11:5 + 1Thessalonians 5:17

 1 Corinthians 6:18  Flee from sexual immorality. All other sins a person commits are outside the body, but whoever sins sexually, sins against their own body. 1 Corinthians 7:2-9 KJV Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband. Matthew 5:28 But I say unto you, that whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart 1Cor.5 It is reported commonly that there is fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife. And ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you.