This is a sort of parallel thread to the drunken Noah thread.
The Genesis account of angels 'materialising' and having sex with women always worried me as a witness. In all animals, man included, the sex drive is hormonal.
Young children generally have no sex drive; how many little lads do you know who are totally 'anti-girl'; kissing is sloppy, etc? As we change from children to adults, hormones start to kick in, making the opposite sex attractive to us. As we get older, the balance of sex hormones starts to change again - we men may need viagra and you women HRT (hormone replacement therapy) in order to fan the flames of passion.
Presumably, angels, being spirit creatures, have no hormones, so why would they ever want to have 'relations' with women? Also, we animals generally (and I say generally) are not attracted to the opposite sex of other species. There is no way I would find a female chimp attractive, no matter how good looking she was in her world!.
Finally, although having no gender, these angels choose to become men and have relations with women. Why not the other way round? Surely there must have been good looking men they could have materialised as women for.