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From Immanuel Kant, the 18th century German philosopher and all-around genius.

When intense study of Kant and the questions of reality that come along with it result in utter confusion and inability to get laid.
Smart Bro #1: "Last night my girlfriend read Critique of Pure Reason and today she doesn't even believe I exist. No way I'm getting laid."

Smart Bro #2: "Total Kantraceptive"
by Dutch Magnum September 12, 2011
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