My Wife/Mistress/KH Ms Karen also has me on a 1 year schedule now. It did not start like that, but She had over time worked me up to it.
I am allowed 1 pleasurable orgasm on Christmas day only. She has often joked that its just like Christmas. Everybody looks forward to it, and like Christmas, I cum but once a year.
During the time in between, I am either locked up, or released for cleaning, teasing, training, milking, etc. Never a pleasurable powerful orgasm, I only dribble and She insists I swallow most everything that dribbles out of me. This makes me very frustrated and submissive.
As full spectrum said, it really drives home the understanding that I am her sub and She controls me.