Sex and desire is ok by the Bible!
Sex is not sin. Augustine introduced sex as a sin and that vision spread to the church. It is not God’s plan that sex is sin. Neither Jesus nor Paul say this directly! They properly encourage the disciples to celibacy, but it is solely for them. Later, the family life is equated with the celibacy up to Augustine. Read more about Augustine
So you can live in the marriage with true desire as in Proverbs 5: 18-19 Let yourself be enraged by her, a lovely gazelle. Let her breasts set your desire.
Or Salamo’s high song 2: 7 don’t wake up love until it wants to. So it has its own will.
So God’s plan is good and perfect love for the spouses man and woman.