Sex is given by God
"Marriage should be honored by all, and the marriage bed kept pure, for God will judge the adulterer and all the sexually immoral" (Hebrews 13:4).
Fulfill your duty to your spouse
"The husband should fulfill his marital duty to his wife, and likewise the wife to her husband" (1 Corinthians 7:3).
Your body also belongs to your spouse
"The wife’s body does not belong to her alone but also to her husband. In the same way, the husband’s body does not belong to him alone but also to his wife" (1 Corinthians 7:4).
Refrain only by mutual consent; for refraining can lead to temptation
"Do not deprive each other except by mutual consent and for a time, so that you may devote yourselves to prayer. Then come together again so that Satan will not tempt you because of your lack of self-control" (1 Corinthians 7:5).
Find satisfaction in your spouse
"May your fountain be blessed, and may you rejoice in the wife of your youth. A loving doe, a graceful deer—may her breasts satisfy you always, may you ever be captivated by her love. Why be captivated, my son, by an adulteress? Why embrace the bosom of another man’s wife?" (Proverbs 5:18-20).