When we lust we are moving in the opposite direction of God. We take a woman and reduce her to an image or an object. We depersonalize her for our consumption. A loving behavior is to expand her by seeing her as God’s child, a wife, mother, and friend. Love expands who she is. Lust reduces her.
You can always tell which direction you are going with a woman by how you are expanding or reducing her. You can always grade where you are with lust and love anytime by using this guideline. Simply ask yourself if you are reducing or expanding her.