“When someone asks you, A penny for your thoughts, and you put your two cents in, what happens to the other penny?”
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George Carlin 270
American stand-up comedian 1937–2008Related quotes

Part II, chapter 4.
Proverbs (1546)
Variant: A penny for your thought.

Introduction.
Polite Conversation (1738)

"Apple should take over government" http://www.youtube.com/watch?feature=endscreen&v=UiZVrzz_zfE&NR=1 May 14, 2010.
Real Time with Bill Maher

“Be careful who you call your friends. I’d rather have four quarters than one hundred pennies. ”
Будьте осторожны, с теми, кого называете своими друзьями. Я бы предпочел четыре четверти, чем сто пенни.
“With one hand he put
A penny in the urn of poverty,
And with the other took a shilling out.”
Book viii, line 632.
The Course of Time (published 1827)

“A penny saved is two pence clear.”
"Hints For Those That Would Be Rich", Poor Richard's Almanack (1737)
Poor Richard's Almanack