6 + 9 = 15, the Tempter. Lucifer tempts so that we can see our defects and bestial vices. Without temptation we cannot see them. The goal is to triumph over temptation. Temptation is fire, triumph over temptation is light.
Remember that the maker of light is the Holy Spirit. So when we work with sexuality, the Tempter is always there, and we must remember that the Tempter always obeys commands of God.
When we read the Book of Job, we see how God commands the Tempter to tempt Job.
Now there was a day when the sons of God (the Beni Elohim) came to present themselves before Jehovah Elohim, and Satan came also among them.
And Jehovah Elohim said unto Satan, Whence comest thou? Then Satan answered Jehovah Elohim, and said, From going to and fro in the earth, and from walking up and down in it.
And Jehovah Elohim said unto Satan, Hast thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that fears God, and eschewed evil?
Then Satan answered Jehovah Elohim, and said, Does Job fear Jehovah Elohim for nought?
Hast not thou made an hedge about him, and about his house, and about all that he hath on every side? thou hast blessed the work of his hands, and his substance is increased in the land.
But put forth thine hand now, and touch all that he hath, and he will curse thee to thy face.
And Jehovah Elohim said unto Satan, Behold, all that he hath is in thy power; only upon himself put not forth thine hand. So Satan went forth from the presence of Jehovah Elohim.
We are all tempted by our particular individual Lucifer or Satan. When we fail, Lucifer becomes mingled with the ego, and then Lucifer becomes Satan. We have to liberate Lucifer from rock of suffering (sex) – remember Prometheus / Lucifer chained to the rock with the vulture eating his liver every day (Greek mythology).