I think they wanted to explore Michael's quest for social legitimacy with Vincent's quest for birth legitimacy, so it wouldn't work with the other kids.
That's an interesting theory, Pete.
If true, Coppola really failed to develop Vincent's quest to the same degree as Michael's.
And it makes the Vincent/Mary dalliance even less explicable (and more gross).
"A man in my position cannot afford to be made to look ridiculous!"
