1. The appropriate action is to restrain oneself, in the dream state, from engaging in that lustful act. This is comprehension: realizing that if one continues in such a desire, a pollution will be the outcome. This of course takes training and willpower.
2. Pronunciation of separate syllables: Bell... Lee... Leen. These are the separate syllables, but it really sounds as one word: Bellilin.
From the lecture entitled the Rune Perth:
When the tower of fire, Belen, is shining on top of our head, it is because the church has already been built. Belen is an Aramaic word, which means tower of fire. Belen is bel-en, the tower of fire, and that word brings to my mind Barbelo, the abode of the light, the place where the light is found. Barbelo. Bar in Aramaic means son; bel means fire. Thus, Barbelo is the son of the fire, the son of the light. Barbelo is on top of Kether. So, when the energy has risen to the top of the head, when it is in the Pineal gland, and when the Crown Chakra is the Aureole of the Saints, Barbelo is shining there—the light of our Bel, in our physicality, and our psychology as well. The true light of Barbelo is there in the Absolute, the Solar Absolute, that light which descends.
Bel is the tower of fire in our psyche and organism that rejects Lillin or Lilith, the negative forces from below. Therefore, the sacred fire Belen rejects Liliin or Lilith, the forces of darkness and ignorance.
3. Cleaning your sheets in the laundry, taking a shower, and burning sulfur for the room are good. You can then use sage to burn around your body and sexual organs to remove other impurities.
You can apply these remedies, like a shower and sage smudging, until you feel clean, but remember, full cleansing occurs when those lustful egos that caused the downfall are dead!