1 Corinthians 7:1-4

Now in response to the matters you wrote about: “It is good for a man not to have sexual relations with a woman.” But because sexual immorality is so common, each man should have sexual relations with his own wife, and each woman should have sexual relations with her own husband. A husband should fulfill his marital duty to his wife, and likewise a wife to her husband. A wife does not have the right over her own body, but her husband does. In the same way, a husband does not have the right over his own body, but his wife does.