Used to describe a sexual position used in foreplay where the man stands behind the woman, with his left hand on her left nipple, and his right hand on her vagina.

The man then proceeds to manipulate both parts of her body with the first and second fingers on each hand in a rhythmic fashion, ensuring that her nipple is gently squeezed between both fingers.

The position and action simulates that experienced by a double bass player.
Jesus mate, all she wanted was double bass sex, I was outa there.
by missadventure October 26, 2006
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