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Piston
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Double
penetration sex
, with one man fucking the girl in her vagina in and the other
in the ass
. They
alternate
thrusts to create a piston action, much like that of an engine.
"You take her
in the ass
,
I'll take
her in
the pussy
and we'll piston her"
by
Color Rot
January 06, 2009
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Piston
mug.
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