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Murray's Law states that everybody is happier when they are receiving sex on a somewhat regular basis. Food tastes better, work is easier, etc. when people are getting sex on at least a somewhat regular basis. Murray's Law can apply to people in relationships or people not in relationships.
Joe: Why has John been so happy lately?

Dave: He's been getting some every night this week. Murray's Law, dude.
by jimmyjohn18 April 05, 2011
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