“Clinton lied. A man might forget where he parks or where he lives, but he never forgets oral sex, no matter how bad it is.”
Variant: Clinton lied. A man might forget where he parks or where he lives, but he never forgets oral sex, no matter how bad it is.
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Barbara Bush 11
former First Lady of the United States 1925–2018Related quotes

“The man forget not, though in rags he lies,
And know the mortal through a crown's disguise.”
Source: Epistle to Curio (1744), Lines 197–198

“Never forget what a man says to you when he is angry.”
Life Thoughts (1858)

As quoted in The World's Religions (1976) by Sir James Norman Dalrymple Anderson, p. 61

Presumed Innocent, Anyone?
The American Spectator
2011-05-17
http://spectator.org/archives/2011/05/17/presumed-innocent-anyone
2011-06-07, quoted in * La Cage Aux Fools
The Daily Show with Jon Stewart
2011-05-19
http://www.thedailyshow.com/watch/thu-may-19-2011/la-cage-aux-fools
2011-06-07
regarding the May 2011 arrest of IMF director Dominique Strauss-Kahn for attempted rape of a hotel housekeeper

Though Erdős used this remark, it is said to have originated with his friend Stanisław Ulam, as reported in The Man Who Loved Only Numbers : The Story of Paul Erdős and the Search for Mathematical Truth (1998) by Paul Hoffman
Variants:
The first sign of senility is when a man forgets his theorems. The second sign is when he forgets to zip up. The third sign is when he forgets to zip down.
As quoted in Wonders of Numbers : Adventures in Mathematics, Mind, and Meaning (2002) by Clifford A. Pickover, p. 64
There are three signs of senility. The first sign is that a man forgets his theorems. The second sign is that he forgets to zip up. The third sign is that he forgets to zip down.
Misattributed

Attributed in Paul Hoffman, The Man Who Loved Only Numbers: The Story of Paul Erdős and the Search for Mathematical Truth (1998)
This has also been attributed, with variants, to Paul Erdős, who repeated the remark.

"The quiet strength of the introvert," The Chicago Tribune, February 20, 2012.