I think the writer Phillip Yancy said it best when he wrote (I am paraphrasing):
God delights that couples are united, and then He closes the curtains and shuts the door.
While prayer is so important, I don't think this kind of edict or book of suggested words for married couples to say before sex is really appropriate or Biblical.
But......whatever.
But did not God touch upon the specialness of married love,romance,and passion in the Bible book of the Song Of Songs?
While that book of the Bible also speaks of the great love God has for His people Isreal as well of Christ for His bride, the Church, there are many references to the loving presence of God.
“If I were the president If I were Queen for a day
I’d give the ugly people all the money
I’d re-write the Book of Love I’d make it funny”
.............amen.
Edict? What edict? A bunch of Catholics publish a book and it's an edict?
God is not a divine voyeur.
...
He closes the curtains and shuts the door.
"On the contrary:" (channeling Aquinas here)
Psalm 139:7-12
Of course we have a few more books in our OT than some Protestants. In one of them, Tobit, there is a lovely prayer right before sex.