“A woman should soften but not weaken a man.”

Speech in 1935, as quoted by Donna E. Shalala, as Secretary of Health and Human Services, in a speech to the American Public Welfare Association (27 February 1995) http://www.hhs.gov/news/speeches/apwa.html
1930s

Here They Are Jayne Mansfield (1992)

Source: Kama Sutra, p. 50

The Rosicrucian Philosophy in Questions and Answers - Volume I: QUESTION NO. 185, 1910s
Context: ... looking at woman suffrage from the larger standpoint, it would be to the advantage of the men of the present day to grant women that which is really their right--a full and complete equality in every particular. The double social standard which obtains at the present time, whereby a man may commit the social sin without being ostracized, should be done away with. Woman's work should be paid as much as man's work,... It would be of an enormous benefit to the race if she were given an equal right with man in every particular. For not until then can we hope to see reforms brought about that will really unite humanity.... While laws are only makeshifts to bring humanity to a higher plane where each one will be a law unto himself, doing right without coercion, it is nevertheless necessary that such reforms should be brought about at the present time by legislation.

As reported by Susan Brownmiller, Against Our Will, Men Women and Rape, (1975) note 3, at 48. the original statement was attributed to Nietzsche; as quoted in War Crimes Against Women: Prosecution in International War Crimes Tribunals https://books.google.com/books?id=ThfzGvSvQ2UC&pg=PA7&source=gbs_toc_r&cad=4#v=onepage&q&f=false, Kelly Dawn Askin, (1997), p.49.
Attributed

[Martha Mitchell, Saturday Evening Post, Fall 1971, 243, 2, 50-53]

Source: Books, Coningsby (1844), Lothair (1870), Ch. 30.