Hmm, interesting question.

My spare body would be female, size, height, weight all proportinate and stunningly atractive, of course. :-)

My spare body would belong to a very creative Dom, such as myself. She would willingly submit to the most creative uses and tasks and suffer no long term effects. she would not need to work, so there would be plenty of time for play.

2 needs would be satisifed, I would be able to study the mental effects of total submission by undergoing it, something that interests me greatly and also feel the effects of phydical treatment and what is does to a physical body. both would help me progress as a Dom.

But, quite an interesting question, if possible, I would enjoy joing the program. :-)