About a man with a charmed life, but it wasn't this one:Trying to identify an old story about a man who wonders why his luck is always good
The story I'm looking for had a different "hook". The man, whose name I believe to be Albers, cheated death once during the war because his plane managed to get to safety when it shouldn't have, and on at least one other occasion due to intervention of a man from the future. Turns out that Albers has some rare gene that they need more of in the future and the "guardian angel" is trying to insure that he lives long enough to reproduce. He (future guy) evens asks the main character if he's gay because he hadn't married yet. The story ends with him married and having a child and realizing that he no longer has the protection of the future guy because he's "served his purpose".