Paul answers what they wrote: it is good for a man not to touch a woman, but because of sexual immorality each man should have his own wife and each woman her own husband. Spouses must fulfill their conjugal duty and not deprive one another, except by agreement and for a time, to devote themselves to prayer. Paul wishes all were as he is, but each has his own gift from God. To the unmarried and widows he says it is good to remain as he is, but if they cannot exercise self-control, they should marry.
To the married he gives a command of the Lord: the wife should not separate from her husband nor the husband divorce his wife. To the rest he says, speaking for himself, that a believer should not divorce an unbelieving spouse who consents to live with him, and that if the unbeliever separates, the brother or sister is not enslaved, for God has called them to peace. In general, each should remain in the condition in which he was called, circumcised or not, slave or free.
About virgins Paul has no command of the Lord, but he judges that because of the present distress it is good to remain as they are, though anyone who marries does not sin. The time is short and the present form of this world is passing away. He wants them free from anxiety so as to serve the Lord without distraction. The engaged may marry without sin, and a widow is free to marry whom she wishes, only in the Lord, though she will be happier if she remains as she is.