Orgasm deprivation does not have to be a negative. In our relationship I have used the process to help tehya gain control of her body - thus the mind rules, rather than the body urges.
This has a couple of effects. Tehya now has a confidence in herself that wasnt present before. She also has greater control of how she accepts and gives pleasure (bonus to me)
Her growing confidence helps with her growing submission. No matter how good a sub 'thinks' they are. In any new relationship...there is always the thought. "Will I measure up."
I would strongly caution against restraint for extended periods. I have heard of time measured in years being quoted. I've never seen the point to that to be truthful.
The other very important thing is to tailor the time periods to the subs ability to cope. Then over time stretch them bit by bit. Teyha has control now she never thought possible. In achieving that she has found how enjoyable it can be to live on that edge. And when release is finally granted. Step back folks...gonna be GREAT.
Sure such training does not fit well in all relationships, and each couple need to decide what role (if any) it should play
Canopus