User blog comment:B214/Talk About What You Want! 3/@comment-5.36.176.7-20150428165245/@comment-26209278-20150429094816

Well, Irina won't have that problem because of the special room Michael made....

Also, it is still very hard for a human/angel to have sex, because neither of them can have any lust at all. Even the most holy of people could corrupt the ceremony. That's why there aren't many Human/Angel hybrids going around, and that they're considered miracles when they are born.

And if Issei was an angel, he'd have fallen ages ago.....