Bereshit B: Chapter 65
"And Hashem saw that the wickedness of man"

When a man wastes the life-force and seed used for procreation, negative forces immediately attach themselves to him. He has destroyed the unborn souls that exist in a state of potential within the seed. Meditating upon these verses removes negative sexual thoughts. Our intense sexual desires are positively channeled towards our spouse, bringing a renewed sense of passion and fire to our relations.