I think you are right Junglepet, this is likely an impossible situation. There is a pretty famous case though, Famous Domina Ilsa Strix and Larry Wachowski, director of the Matrix. The Story is here: http://lecter.org/forum/showthread.php?t=248

I imagine often the sub falls for the Domina and that the Domina gets pretty good at holding the Sub off.
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