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The ratio of dicks per day inside a certain girl over a certain period of time. A ratio other than 1:1 is considered unfavorable.
That girl's dick to day ratio was like 3:1 last weekend. So unfavorable man.

She had 5 guys in her at the party on Saturday, that's a 5:1 dick to day ratio.
by Brooks1 October 10, 2012
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