Kistemaecker, as quoted by Bloch (Beiträge, etc., ii. p. 340), alludes in this connection to the dark clothes of men and to the tendency of women to wear lighter garments, to emphasize the white underlinen, to cultivate pallor of the face, to use powder. "I am white and you are brown; ergo, you must love me"; this affirmation, he states, may be found in the depths of every woman's heart.
K. Pearson, Grammar of Science, second edition, p. 430.
In Man and Woman (fourth edition, p. 65) I have referred to a curious example of this tendency to opposition, which is of almost worldwide extent. Among some people it is, or has been, the custom for the women to stand during urination, and in these countries it is usually the custom for the man to squat; in most countries the practices of the sexes in this matter are opposed.