Though we adore men individually, we agree that as a group they're rather stupid.
Source, in full
Mrs. Banks as a Suffragette in Mary Poppins, 1964; cited in: Eric Grzymkowski (2011), The Quotable A**hole: More than 1,200 Bitter Barbs, Cutting Comments, and Caustic Comebacks for Aspiring and Armchair A**holes Alike. p. 190