A specific act involving a midget, a woman, and a 100-foot slide-and-slide. The woman lays back at the end of the slip-and-slide with her legs wide open. The midget then is slid down the slip-and-slide at a high speed, resulting in the midget sliding all the way down the slip-and-slide, and going so far into the woman's vagina that it ends up entirely inside of her, resulting in what looks like a birth in reverse (hence the name, reverse birthing).

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