Stopping everyone he meets and shouting "It's a boy"

What does he look like, that boy of mine?
Since the news came I can't get him off my mind

Does he resemble his homely dad?
Does he look like the girl that I left behind?

Bring on the Germans
And bring on the Japs
Bring on the first who you can find

One for the rascal I haven't seen
And one for the girl that I left behind