Is it normal for men to be unsatisfied after they are stimulated with

my boyfriend and I did some experimenting and although reluctant I played along. He was always eager to get me analy and so I broke down n allowed him to do it. Remembering quite a few articles Id read about mens prostate being stimulated I figured Id try and see how he responded. Well long story short...he absolutely loved it. Which all and all pleased me because that is what we both hopefully had set out for was to please each other. Well as time passed he began wanting me to do that to him more and more. Then it got to the point where it had to happen everytime we messed around. Totally killed it for me..became too demanding and stripped the value of the act itself which was me doing whatever meerly because I wanted to...my way of expressing my love toward him. When sex becomes an agenda or an expected performance it makes me feel like Im a tool and only there for him. Like a whore or prostatute. Long story short I shared with him how it made me feel and that I was really bothered by his obsession to get his needs met while mine no longer seemed to matter...it was then that he told me that it doesnt feel as good normally for him to orgasim as it does with his prostate. Created massive problems for us sexually for months now. He will throw a fit and get angry if I dont get his needs met...and cut me off altogether. I am so unbelievably horny its unreal and just want to have sex...make love. I dont want to feel obligated to perform certain acts if Im not feeling into it..and knowing that he will become demanding and have a fit and punish me so to say if I dont...so I just dont touch him at all. Is that a normal response for men that are stimulated via prostate..Does it ruin normal sex for u all? Or is my boyfriend just self absorbed and being a jerk. Im truely confused. Frustrated..fear our entire relationship might be at jeapordy if this isnt resolved soon.