recently i had a rather good convo with a Dom on how He would fist me... if given the chance....
He would start out by tieing me spread eagle on a table. then He would go down on me. get me good and wet. have me begging for an orgasm. then He would begin sucking on my clit. no other stimulation. just sucking on my clit. as He did this He would then begin putting fingers inside me, one at a time. (three is pushing it for me) then after He got all four in, He would pause, while still sucking on my clit. then He would position His fingers that were inside me, so they made a wedge. then while still sucking on my clit He would begin pushing His hand into me. He would keep pushing until His hand was in past the joint of His thumb. then He would pause again, while sucking on my clit. then He would clench and ball His fist up inside me. thats when i would be given permission to cum.
so needless to say after that little story.... i'm extremely interested in trying..... *grins*