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A popular sex move where an intimate couple is having doggie style sex... The male bear huges the female and springs onto his back while keeping his dick in her vagina... Once on their backs the couple peddles their legs as if riding a bike. Usually used as the final position of the night.

"Im almost about to spurt babe, you wanna move to the tandom bicycle now?"
by Nuchibuchi August 15, 2006
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