The answer is the prone bone position. The top is literally on top of the bottom's back when they're laying down on their belly. The top can make it extra special by using their hands and arms to hold down the bottom's hands and arms, same thing with the legs. Entering the vagina or the anus feels great in this position. The top can adjust how deep they enter by positioning themselves upward, easiest when already inside the bottom. Also helps of there is a small pillow underrate the bottom and they push their ass up and out away from the bed.
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