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A spin-off of the sexual position Eiffel Tower. It is performed with two guys and two girls. The girls 69 in the middle, while each guy takes one from the back. They then High five over the two girls to make an Eiffel Tower shape.
Yo jack, what was that where the two girls were 69ing and we were each doin one?

That was a double decker Eiffel Tower, chad.

Oh. Sweeeeet.
by Youeatmonkeys November 11, 2010
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