(1) Captain Jeffrey Spaulding (Groucho Marx) proposing marriage to both Mrs. Rittenhouse (Margaret Dumont) and Mrs. Whitehead (Margaret Irving) in Animal Crackers (1930):
-- Spaulding: ' Well, what do you say, girls? Are we all going to get married? '
-- Rittenhouse: ' All of us? '
-- Spaulding: ' All of us! '
-- Rittenhouse: ' Yes, but that's bigamy! '
-- Spaulding: ' Yes, and it's big-of-me too. It's big of all of us. Let's be big for a change. I'm sick of these conventional marriages. One woman and one man was good enough for your grandmother, but who wants to marry your grandmother? '
(3) Frederic Mullally, The Penthouse Sexicon (1968): ' Man who believes that two mates are more fun than one. Naturally, this makes him a criminal.'