MMMMMM - love me a dark furry sub!  This looks like just the beginning of a fun day for both of you.  I'd get a nice wide leather strap to use on those ass cheeks and soles of those feet (thanks for tying the toes to the stocks).  If you had one of those spanking machines that rotates the leather strap around and around to spank those cheeks would be even better.  And tie up those nice balls to a thin rope up and through the stocks and back down to some nipple clamps.  Of course, the rope would be just a little short so he would have to do a slight crunch with his abs or bear the pain of balls and nipples being pulled.  Then I would have to see how much of a grower his little dicklet is, in order to decide how to deal with that.  One question for you - is that duct tape on the right side of his thigh?  Why is it there?