So the angels in Heaven do NOT have sex; but the fallen ones DO??
Matthew 22:30
At the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven.
Your post 532 is eye-opening and inspired.
The verse doesn’t say they are unable, but merely implies the angels in heaven do not marry.
There are cases of demons, i.e. fallen angels, without bodies, who engage in sexual activity with humans. They are forbidden, but not impossible. They also are sought by those in some occultic circles.
While I don’t know with certainty that such an interpretation of Gen 6 is true, there is definitely sound historical basis to support that interpretation.
They're supernatural, they pulled it off somehow. Their mission was to destroy Adam's family.