My -mostly- Dom has been leaving me hanging almost everytime we do anything, but he's been refusing to acknowledge that he's even doing it. He lets me cum about once a month, ( I satisfy him every two or three days, at least) the rest of the time he uses me for his pleasure and doesn't do anything long enough for me to be satisfied. If I had done something wrong and was being punished I may be able to handle it, but the only thing he ever seems to be upset at me for is bringing this up in the first place. I kind of feel like he's being horrible, or selfish, but maybe I'm expecting too much if I want him to make me cum every time we play.
Is it healthy to be denied orgasms that often for that long, on purpose or not, or could it lead to future sexual dysfunctions or difficulties, or even damage the relationship?