The angels who fell were once part of all angelic creations, have to ask who produced the Nephilim ? angels cohabitated with women.
Genesis 6:1 And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
2 That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.
3 And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.
4 There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
Jude 1:6 And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
Satan had a plan to pollute the entire human race to keep Jesus from being born as a man according to scripture but God preserved the bloodline.
Jude speaks of angels who left their own habitation and first estate which could be an angelic body in exchange for a human body, but when God came to Abraham with two angels, they ate human food, angel baked a cake for Elijah and the angels who destroyed Sodom due to their neglect of the poor and idolatry, were seen as handsome and desireable by those who wanted to have sex with them, just have to say that I am content to wait and see after we exchange this tent of human flesh for the new glorified model, although am curious about what kind of plumbing we will have.
Lou
http://www.vietvet.org/loutplei.htm