Yeah it really puts a damper on the whole: the sons of god began to notice the daughters of men and have passion for them?!? What would induce an emotionaless being to desire a woman? To further the sexless nature of angels when Jesus was asked about the resurection and whose wife a woman would be he confirmed that the resurected would be as angels and that was it! its like a known fact of the time was an angel was a sexless being and that was the end of that argument.
So HOW can a sexless being WHO IS PERFECT be tempted to the point of lust by the daughters of men?!?