I have only just experienced cum restriction - as in, the first time today. I never thought I would like it at all, orgasm denial was something I said to him I would never want. I do not think he will deny me for very long, or fully unless it was punishment. But then again, who knows what the future holds!
But anyway, back to today, as you do, get all cosy, playing a little - getting terribly horny, and he tells me he is going for a shower. I was to touch myself until he returned, but not to cum...
I was a little taken aback by it, but did as instructed, it felt like the longest shower ever!!!
But oh my god, when he returned and I got to cum some time later, it was marvellous, and now I understand why it is used - well, why he uses it.
I will watch this thread with interest.
I wish you all well with it, I may be joining in more as he trains me up on this 'test' of obedience.