The Power of Masturcizing and The Mirror Trick (by Patti, ntcweb)
Later when talking it over (we always do this) he explained that one of the problems he was having was that there was "no hope" for him, and that made it very, very difficult. Now, I know all you experienced and professional dommes will tell me that I shouldn't care, but we're taking this very slow and easy (and I should say, loving every minute of it) and I like to make sure that he is OK with it in every respect, because I can't imagine going back to the old vanilla days.
Anyway, he went to sleep still frustrated (though I didn't, as I always make him give me some oral pleasure before drifting off) and woke up the same way. I kept a very close eye on him yesterday (Sunday) to make sure he didn't try to wank himself off, and I kept feeling his balls and cock to insure that he was still full (and also to tease him).