Kneeling 69 Sex Position
The Kneeling variation of the 69 position amps up the difficulty, though is a lot safer than its standing cousin. The man will require a fair amount of core strength and balance to hold the position, assuming he doesn't throw out his back getting into it. Although being born airborne is a lot more exciting, both partners will likely need to use both of their arms to stay in position, limiting pleasure to oral only.
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