I googled this:
“Spiritual marriage or chaste marriage comes from the original divine law that marriage should be the union between soulmates who are attracted to each other by divine magnetism and not by the animal magnetism of sexual activity.”
It reminds me of this:
[36] If any one thinks that he is not behaving properly toward his betrothed, if his passions are strong, and it has to be, let him do as he wishes: let them marry -- it is no sin.
[37] But whoever is firmly established in his heart, being under no necessity but having his desire under control, and has determined this in his heart, to keep her as his betrothed, he will do well.
[38] So that he who marries his betrothed does well; and he who refrains from marriage will do better. 1 Cor 7:36-38 RSV