1 Corinthians 7:1-2 (KJV) Now concerning the things whereof ye wrote unto me: It is good for a man not to touch a woman.
Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
The single life at Corinth at that time was good, but only if single believers could abstain from sexual immorality.
1 Corinthians 7:3-4 (KJV) Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband.
The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.
Any marriage is headed for trouble when either husband or wife will not follow this principle.
1 Corinthians 7:5 (KJV) Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.
If they stay apart for a long time they may be giving Satan an opportunity to tempt them to sin with others. Do not deny each other for the body is flesh and will lust after flesh.
Know Your Bible 