the theory that, as a duck needs gravel to eat and digest its food, a man needs sex to live.
"Man, I'm taking you to the bar tonight. You need to get some gravel for your duck"
by old man dan March 1, 2008
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the theory that, as a duck needs gravel to eat and digest its food, a man needs sex to live.
"Man, I'm taking you to the bar tonight. You need to get some gravel for your duck"
by "OMD" February 29, 2008
Get the gravel for your duck mug.