An unexpected position that I've found to be awesome is the lee on a spanking bench with their ankles secured in place, and their hands cuffed behind their back. I like it because then if I want to add in some impact play the bottom is already in position for a spanking.
I got email spammed by this guy once too, hence why I watched what I could of the documentary. I couldn't make it too far in though, it just got too real for me and I "noped" out.