joedeep,
I'd be willing to share some details of the role playing I do with my wife here in the General Discussion section or I can PM or email you direct if the mods deem the content inappropriate for this forum... we're all adults here at Quicksand Fans, but I don't want to overstep what is generally accepted content to share in a public forum.
The vast majority of the role play has my wife in a dominant role and me trapped and sinking helplessly in deep quicksand that I can't get out of without help. Different quicksand scenes play as a backdrop, sometimes sound effects, sometimes she reads a passage from a book that deals with quicksand. Often, there is foot worship involoved as she will try to rescue me by reaching out to me with her feet so I can try to grab on to pull myself out...off come her shoes during the role play
The sessions last as long as I do... sometimes just a couple of minutes, sometimes we play for an hour.