Sex differences in humans

Man does, woman is
  —Robert Graves

Sex differences in humans have been studied in a variety of fields. Sex determination generally occurs by the presence or absence of a Y in the 23rd pair of chromosomes in the human genome. Phenotypic sex refers to an individual's sex as determined by their internal and external genitalia and expression of secondary sex characteristics.

Sex differences generally refer to traits that are sexually dimorphic. A subset of such differences is hypothesized to be the product of the evolutionary process of sexual selection.

Quotes

• Munditias mulieribus, viris laborem convenire
• Elegance is proper to women but toil to men
  • Sallust, Bellum Jugurthinum, 85, 39
  • J. C. Rolfe, tr., Sallust, LCL 116 (1921; rev. 1931), p. 321

• The husband’s the pilot, the wife is the ocean,
  He always in danger, she always in motion:
  • Tom Brown, "A Satire on Marriage"
  • Works in Prose and Verse (1730)

• Man is the will, and Woman the sentiment. In this ship of humanity, Will is the rudder, and Sentiment the sail: when Woman affects to steer, the rudder is only a masked sail.
  • Ralph Waldo Emerson, "A Lecture read before the Woman's Rights Convention, Boston" (20 September 1855)
  • Miscellanies (Boston and New York: Houghton, Mifflin and Co., 1906), p. 407

• When men were men, and women were glad of it.
  • Unknown; apparently anonymous
  • Reported in: "Strike Me Pink". The Stoutonia, vol. XXV, no. 27 (1 May 1936), p. 2

• Vive la différence!
• [Long] live the difference!
  • Attributed to Anatole France. Originally referring to the difference between the sexes; the phrase may be also used to celebrate the difference between any two groups of people (or simply the general diversity of individuals)
  • "Miles Kington Remembered: There's a whole world of difference between the sexes". The Independent (4 June 2008)

• Man does, woman is
  • Robert Graves, Man Does, Woman Is (New York: Doubleday & Co., 1964)