Simple: He was NOT speaking as a PROPHET when he said THOSE things!
Why don't you GENTILES learn how to PARSE pseudo-scripture correctly?
--MormonDude(I understand it!)
Enoch was speaking -writing- the exact words that God, in the Person of YHWH SEEN, who is the Great Glory [who is come in flesh of second creation and is Jesus Christ] said for him to write.
Jesus refers to what Enoch wrote [and Enoch said that he wrote it for all the descendents of him, and we are all his descendents through Noah] when He spoke to the Sadducees and said “you err, not knowing the Scriptures [sacred writings] nor the power of God, for in heaven they do not marry and are not given in marraige [as Adam was, on earth] but are as the angels of God.
The angels do not have sexual union in heaven, as the Great Glory who spoke to Enoch, to write, stated.