Ok, well in the canon - as said - there is no time the Word of God has ever put the restriction on angels. Humans have done that; that has been doctrine to substantiate that Gen 6 is about human-human interaction, not human-angel interaction.
The doctrine needs The Word of God to have said, "Angels cant marry", as opposed to "Angels will neither give, nor take in marriage". That is because holy creatures' will is the will of the Most High God. It says nothing, however, about the abilities of angels - least of all the abilities of a fallen angel to forsake the will of the Most High God and do something unnatural.
The context is holy angels, not the ones who got kicked out of heaven and decided to defile the creation of the Most High God.
If you considered Enoch even, I could point you toward specific verses that list those angels' abominations, as well as their names and designations. The gnostics go into even more detail.