Robert Preston, "Marian the Librarian" from The Music Man: Original Soundtrack (The Last Angry Man)
"Now in the moonlight,
A man could sing it,
In the moonlight,
And a fellow would know that his darling
Had heard every word of his song,
With the moonlight helping along.
"But when I try in here
To tell you, dear,
I love you madly, madly, Madame Librarian, Marian!
It' a long-lost cause: I can never win!
For the civilized world accepts as unforgivable sin
Any talking out loud with any librarian,
Such as Marian, Madame Librarian."