We might take Bentham a lot more seriously if he didn't spend a substantial part of his life trying to make prison management more efficient: https://en.m.wikipedia.org/wiki/Panopticon
He also "referred to his walking stick as 'Dapple, and his cat as 'The Reverend Sir John Langbourne.'
Not to get pedantic, but more humorous utilitarianism examples would have been Mill or Hare.