"And the Lord said, “My Spirit shall not strive with man forever, for he is indeed flesh; yet his days shall be one hundred and twenty years.”
"There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men and they bore children to them. Those were the mighty men who were of old, men of renown."
So, how do you explain the giants? Giants being "Mighty men of reknown." Even though these were slain at the flood, it is apparent that again, these evil angels were able to enter into pro-creation upon Earth.
Goliath and his brothers came from this seed. Angels did take women on Earth to wife, as bizarre as it sounds, and had sons of their own.
"The word of God states that angels are sexless, neither Godly nor fallen angels can have sex. That alone undermines that teaching." wombat1
The Word of God never once says that angels are sexless, nor does it state that they cannot have sex.
"Jesus answered and said to them, “You are mistaken, not knowing the Scriptures nor the power of God.
For in the resurrection they neither marry nor are given in marriage, but are like angels of God in heaven."
First of all, this is referring to holy angels and the holy redeemed; to the angels of God, in HEAVEN; not the angels of Satan. Men will be like them; we will not marry.
Secondly, the reference is to them not being married, not to their ability or inability to have sex, and Jesus is referring to the Resurrection time, which these fallen angels will never see. Neither holy angels or holy man will be married, or have sex, in a holy heaven, I agree.
"There is also a related teaching of a pre adamic creation which is where the Nephilim may have originated. Either we believe Gods word concerning Adam being the first man or we do not." wombat1
The reference to the Nephilim, has nothing to do with a pre-Adamic creation of mankind in my mind, but everything to do with a pre-Adamic rebellion in Heaven of angels; where holy angels became evil angels.
These unholy angels tempted the first man at the edge of the garden, in the tree. After that fall, it appears to me, that they defiled that first body of men, through fornicating with the women they chose; there-by creating these extra-humans; 10 feet tall monsters; half human, half demon; mighty men of reknown, like Goliath, or "Hercules".
This is the Bible explanation. Do you have another answer to as how these beings arrived on earth?
"And a champion went out from the camp of the Philistines, named Goliath, from Gath, whose height was six cubits and a span. [ 10 feet high]
He had a bronze helmet on his head, and he was armed with a coat of mail, and the weight of the coat was five thousand shekels of bronze. [ 125 lbs.]
And he had bronze armor on his legs and a bronze javelin between his shoulders.
Now the staff of his spear was like a weaver’s beam, and his iron spearhead weighed six hundred shekels; and a shield-bearer went before him."
There are several more mentioned in the Bible; a "race of giants."..IE: Nephilim.