“I comfort myself with the reflection that your wife will possibly be able to curb your desire--I admit, a natural one for the most part--to exterminate your fellows.”

Source: The Beautiful and Damned

Quoted by Jan Lundius, in Does WFP Deserve the Nobel Peace Prize?, Inter Press Service News Agency, (December 2020)

The Dignity of Human Nature (1754)

Source: The Unabridged Journals of Sylvia Plath

Dates to 1899, American humor origin, originally featuring a woman upset by a man's cigar smoking. Cigar often removed in later versions, coffee added in 1900. Incorrectly attributed in Consuelo Vanderbilt Balsan, Glitter and Gold (1952).
See various early citations and references to refutations at “If you were my husband, I’d poison your coffee” (Nancy Astor to Churchill?) http://www.barrypopik.com/index.php/new_york_city/entry/if_you_were_my_husband_id_poison_your_coffee_nancy_astor_to_churchill, Barry Popik, The Big Apple,' February 09, 2009
Early examples include 19 November 1899, Gazette-Telegraph (CO), "Tales of the Town," p. 7, and early attributions are to American humorists Marshall P. Wilder and De Wolf Hopper.
Churchill by Himself: The Definitive Collection of Quotations, by Richard Langworth, PublicAffairs, 2008, p. 578.
The Yale Book of Quotations, edited by Fred R. Shapiro, New Haven, CT, Yale University Press, 2006, p. 155.
George Thayer, The Washington Post (April 27, 1971), p. B6.
Misattributed
Variant: Lady Nancy Astor: Winston, if you were my husband, I'd put arsenic in your morning coffee.

Winston Churchill: Madam, if you were my wife, I'd drink it.

Sex Slavery (1890)
Context: Look how your children grow up. Taught from their earliest infancy to curb their love natures — restrained at every turn! Your blasting lies would even blacken a child's kiss. Little girls must not be tomboyish, must not go barefoot, must not climb trees, must not learn to swim, must not do anything they desire to do which Madame Grundy has decreed "improper." Little boys are laughed at as effeminate, silly girl-boys if they want to make patchwork or play with a doll. Then when they grow up, "Oh! Men dont care for home or children as women do!" Why should they, when the deliberate effort of your life has been to crush that nature out of them. "Women can't rough it like men." Train any animal, or any plant, as you train your girls, and it wont be able to rough it either.

1990s, "Hit 'Em Up" (1996)

http://www.drdrew.com/article.asp?id=393.