Requiring a decent amount of flexibility, the Kneeling variation of the Sinner might not be the most comfortable for all to enjoy. Having the woman on her knees offers a different penetration angle to having the legs extended, though it can be a bit limiting for generating movement. Consequently, the majority of the thrusting movement will need to be provided by the man, though we definitely recommend that the woman experiment with some hip movement to add to the pleasure.
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