“Sex is two plus two making five, rather than four. Sex is the X ingredient that you can't define, and it's that X ingredient between two people that make both a man and a woman good in bed. It's all relative. There are no rules.”

Variant: Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
Source: 1984

Reported in Maturin M. Ballou, Pearls of Thought (1882), p. 142.

The Complete Neurotic's Notebook (1981), Marriage

Whistler v. Ruskin
posthumous published

Source: Mathematics and Humor: A Study of the Logic of Humor (1980), Chapter 1, “Mathematics and Humor” (p. 10)

Source: The Outsider (1956), Chapter Nine, Breaking the Circuit

Source: 1984

2014, Young Southeast Asian Leaders Initiative Town Hall Speech (November 2014)
Context: But I also think that from what I've heard, one of the reforms that will need to take place in universities here is to make sure that in all the departments there is the ability for universities and students to shape curriculums and to have access to information from everywhere around the world, and that it's not just a narrow process of indoctrination. Because the best universities are ones that teach you how to think not what to think, right? A good education is not just knowing facts, although you need to know facts. You need to know that two plus two is four; it's not five. That's an important fact. But you also need to know how to ask questions, and how to critically analyze a problem, and how to be able to distinguish between fact and opinion, and how to compare two different ideas.

respect, not contempt.
Source: SCUM MANIFESTO (1967), p. 10 ("respect, not contempt." (not bracketed in original) not certain in original due to truncation of bottom of photocopy page but consistent with it).