Cheaper by the Dozen (1950)
Repairman: All those kids yours mister, or is this a picnic?
Frank Gilbreth: They're all mine and believe me, it's no picnic!
Man on street: Hey Noah, what are you doing with that Ark?
Frank Gilbreth: Collecting animals like the good Lord told me brother. All we need now is a jackass. Hop in!
Mailman: All those kids yours?
Frank Gilbreth: Oh, these aren't so many. You ought to see the ones we left behind.
Mailman: How you ever feed 'em?
Frank Gilbreth: Oh, they come cheaper by the dozen.
Frank Gilbreth: [while escorting Ann out of the house on her first date] I know its not your fault Lilly, but things would have been a whole lot easier if you'd taken my advice and had all boys.
Mrs. Lillian Gilbreth: I'm sorry, dear. I'll try to be more careful with the next dozen.