Hebrews 13:4 reads Let marriage be held in honor among all, and let the marriage bed be undefiled, for God will judge the sexually immoral and adulterous. Within a marriage, partners are meant to be faithful to God and each other. The sexually immoral person sins against his own body.

What does the Bible say about depriving your spouse?

The wifes body does not belong to her alone but also to her husband. In the same way, the husbands body does not belong to him alone but also to his wife. Do not deprive each other except by mutual consent and for a time, so that you may devote yourselves to prayer.