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when there's not full access to a penis and so a full grip of the hand cannot be obtained such as in the cinema when your dicks inevitably through the bottom of the popcorn box, so the index and middle finger become like the claw of a hammer and the penis being like the nail that's being pulled giving a better grip
Was sittin in mass and Jess gave me such a hammer wank
by Mattc96 February 25, 2015
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